National Dex Ubers Specially Offensive Yveltal [QC 3/3] [GP 2/2]

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Sami

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[SET]
name: Specially Offensive
move 1: Dark Pulse
move 2: Oblivion Wing
move 3: Taunt
move 4: Sucker Punch / Knock Off / Heat Wave
item: Life Orb
ability: Dark Aura
nature: Naive / Timid
evs: 4 Atk / 252 SpA / 252 Spe or 32 HP / 8 Def / 236 SpA / 8 SpD / 224 Spe
tera type: Dark / Flying / Fire

[SET COMMENTS]

* Yveltal's amazing STAB combination, which is only resisted by Zacian-C and niche Pokemon like Mega Diancie, in conjunction with Life Orb makes it a potent wallbreaker and stallbreaker for balance, bulky offense, and hyper offense teams alike. This is to the point where it is deemed mandatory on Sticky Web teams due to its efficiency and role compression as a source of priority and strong damage dealer as well as its sheer versatility with its movepool and Terastallization options. Yveltal's Speed tier outside of Sticky Web is also fantastic, outspeeding the majority of the defensive metagame including Pokemon such as Primal Groudon, Zygarde, and Ho-Oh and only being outsped by Calm Mind Arceus formes and Eternatus. It also carries useful defensive traits against Pokemon such as Ultra Necrozma, Deoxys-A, and Marshadow, despite it being weak to Stealth Rock. This makes it more flexible compared to other wallbreakers like Rayquaza and the aforementioned Deoxys-A, which rely much more on pivot support and revenge killing opportunities; this is all while simultaneously being good against opposing offense teams and not being prediction reliant.
* Oblivion Wing provides Yveltal with a source of longevity, making up for its Stealth Rock weakness and the Life Orb recoil it takes while being useful against foes such as Marshadow, Alomomola, Arceus-Fairy, and Arceus-Dark, with Oblivion Wing being needed to beat the latter two under Sticky Web.
* Taunt is mandatory on Yveltal, since it allows it to make progress much more easily by punishing more passive Pokemon such as Coil Zygarde, Ferrothorn, and Alomomola. This lets it avoid status conditions such as paralysis and Toxic poison while preventing any setup opportunities from Zygarde, Necrozma-DM, Arceus-Ground, and Zacian-C. It also ensures that entry hazards such as Sticky Web stay up against common Defog users such as defensive Ho-Oh and Giratina-O, especially with Tera Fire for the former to resist Sacred Fire.
* Sucker Punch allows Yveltal to revenge kill Ultra Necrozma after a single layer of Spikes, Deoxys-A, and Mega Mewtwo Y, making Yveltal good at handling opposing offense teams. Knock Off allows for better wallbreaking against balance and stall teams, notably removing Heavy-Duty Boots from Ho-Oh and opposing defensive Yveltal alongside removing Eviolite from Chansey, all of which Yveltal's teammates can take advantage of. Heat Wave should only be used with Tera Fire and on Sticky Web teams, but it allows Yveltal to snipe Zacian-C, removing one of Yveltal's sturdy checks, and it is significantly less useful than the other two options.
* A Naive nature is preferred over Hasty on the first EV spread, since it allows Yveltal to withstand pressure from Marshadow more reliably. It also allows Yveltal to avoid an OHKO from Deoxys-A's Rock Slide even after Stealth Rock chip damage. The secondary EV spread allows Yveltal to avoid several OHKO rolls including Choice Band Rayquaza's Dragon Ascent, Zacian-C's Wild Charge, and Choice Specs Lunala's Moonblast; uninvested Arceus-Fairy's Judgment and defensive Primal Groudon's Overheat after one round of Life Orb recoil; and defensive Primal Kyogre's Ice Beam after Stealth Rock chip damage and one round of Life Orb recoil. This is all while still outspeeding base-95 Speed Pokemon such as Rayquaza and Kyurem-B with a Timid nature, at the cost of not outspeeding Lunala anymore. A Modest nature is not encouraged since outspeeding Rayquaza on Sticky Web teams, as well as maximum Speed Primal Groudon and Primal Kyogre, Kyurem-B, and Zekrom outside of Sticky Web, is heavily important for Yveltal's effectiveness as a wallbreaker.
* Tera Dark is the primary Tera type on Yveltal, bringing its damage to all new heights. It notably lets Yveltal OHKO Eruption Primal Groudon and Rayquaza and 2HKO defensive Primal Kyogre and Ho-Oh, all with Dark Pulse. It also lets Yveltal more reliably OHKO Ultra Necrozma with Sucker Punch, which is necessary for the second EV spread, as it runs a Timid nature. Tera Dark also removes Yveltal's weakness to Stealth Rock, giving it more longevity despite struggling slightly more against Marshadow, since it no longer takes neutral damage from Low Kick.
* Tera Flying boosts the power of Oblivion Wing, letting Yveltal 2HKO Arceus-Fairy after Stealth Rock and defensive Yveltal as well as have a small chance to 2HKO Calm Mind Arceus-Dark after Stealth Rock, thus allowing it to muscle through these Arceus formes under Sticky Web. Removing the Dark-type from Yveltal is especially useful to punish Arceus-Fairy harder, although Yveltal no longer resists Ghost-type attacks from Marshadow and Lunala. Tera Fire lets Heat Wave OHKO Zacian-C while letting Yveltal more safely deal with defensive Ho-Oh and the aforementioned Arceus-Fairy. This arguably makes Tera Fire the best Terastallization option for Sticky Web teams, since Yveltal is strong enough without Tera Dark, although it does not let Yveltal quickly muscle through Arceus-Fairy like Tera Flying does. Tera Fire must only be used on Sticky Web teams, however, since that's the only situation where Heat Wave is useful, and beating Ho-Oh and Arceus-Fairy is only worth exhausting Terastallization for when Yveltal is encouraged to use Taunt to maintain Sticky Web against the former and it is able to outspeed and use Taunt against the latter to win the one-on-one.
* It is ideal to avoid status conditions as much as possible, especially since Yveltal has poor longevity. Toxic from Eternatus and defensive Arceus-Dark reduces Yveltal's longevity drastically, while Oblivion Wing struggles to make up for it. Paralysis from Zygarde and Giratina-O means Yveltal cannot outspeed bulky targets anymore, notably Primal Groudon, Ho-Oh, and Zygarde. Burns from Ho-Oh and Giratina-O drastically weaken Sucker Punch, notably preventing it from OHKOing Mega Mewtwo Y and Ultra Necrozma, even with Tera Dark, although this weakness is heavily mitigated for Tera Fire variants.
* Outside of hyper offense teams, Yveltal works best early-to-mid game, where it is able to break through physically defensive walls such as Primal Groudon and Zygarde for its teammates. While it appreciates pivot support from Pokemon such as Alomomola and Landorus-T, Yveltal can be used aggressively against moves it is immune to, such as Primal Groudon's Precipice Blades and Lunala's Psyshock; this is extremely risky, however, and it is not ideal to do this frequently since Yveltal is easy to KO with Overheat from Primal Groudon or Moonblast from Lunala, with both OHKOing after one round of Life Orb damage.
* On Sticky Web teams, wallbreaking is Yveltal's main purpose, and so it should be used early-game to break through physically defensive walls such as Primal Groudon and Zygarde while maintaining Sticky Web and other hazards against Defog users such as Giratina-O and Ho-Oh with Taunt.
* Against teams with Ultra Necrozma, Deoxys-A, and Mega Mewtwo Y, it is necessary to preserve Sucker Punch Yveltal in order to revenge kill these threats and prevent them from getting out of hand. If Yveltal is running Knock Off instead, not only is it important to run another form of priority, such as Marshadow's Shadow Sneak, but Yveltal may want to play more aggressively with double switches to stop these threats from setting up safely as well as to wallbreak harder against defensive cores including Ho-Oh, Eternatus, and Zygarde.
* Yveltal is walled by Calm Mind Arceus-Dark, Arceus-Fairy, defensive Eternatus, and Fezandipiti. On hyper offense and bulky offense teams, Behemoth Blade Zacian-C handles all four of these and checks Extreme Killer Arceus, which would otherwise easily revenge kill Yveltal after Life Orb chip damage. Zacian-C appreciates Yveltal breaking through Primal Groudon and Dondozo for it in return. Sticky Web support from Smeargle or Shuckle helps Yveltal prevent Calm Mind Arceus-Dark from setting up on it, letting Yveltal beat it and even Arceus-Fairy with Tera Flying or Fire one-on-one. Smeargle also removes Stealth Rock with Mortal Spin, assisting in Yveltal's longevity. Meteor Beam Eternatus is able to break past Arceus-Fairy and opposing Eternatus and snipe Ho-Oh with Meteor Beam while appreciating Yveltal breaking through Necrozma-DM. Finally, Chi-Yu can help overwhelm common checks with Yveltal, such as Arceus-Fairy and Eternatus; it too has Taunt to maintain Sticky Web.
* On bulky offense and balance teams, Primal Groudon is a great partner, since it appreciates Yveltal breaking past Zygarde and Giratina-O for it and Primal Groudon can check Arceus-Fairy, Zacian-C, and defensive Primal Kyogre while supporting Yveltal with entry hazards. Offensive Ho-Oh is a similar case, checking Arceus-Fairy and Arceus-Dark, and it helps deal with Yveltal's weakness to Stealth Rock with Defog support while potentially weakening foes such as Eternatus with Thunder Wave for Yveltal to punish later. Dragon Dance Necrozma-DM and Dragon Dance Zygarde appreciate Yveltal breaking through common defensive walls such as Primal Groudon, Coil Zygarde, and Giratina-O for their late-game sweeps, while Coil Zygarde is useful for paralysis support and as a blanket check to physical threats such as Primal Groudon and offensive Ho-Oh that may want to trade with Yveltal.

[SET CREDITS]
Written by:
https://www.smogon.com/forums/members/sami.604820/
Quality checked by:
https://www.smogon.com/forums/members/anchor9.652323/
https://www.smogon.com/forums/members/bumboclaat.523420/
https://www.smogon.com/forums/members/bobsican.434487/
Set(s) by:
https://www.smogon.com/forums/members/bumboclaat.523420/
Grammar checked by:
https://www.smogon.com/forums/members/sunny004.197240/
 
Last edited:
Good job! QC 1/2.
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[SET]
name: Specially Offensive
move 1: Dark Pulse
move 2: Oblivion Wing
move 3: Taunt
move 4: Sucker Punch / Knock Off / Heat Wave
item: Life Orb
ability: Dark Aura
nature: Naive
evs: 4 Atk / 252 SpA / 252 Spe
tera type: Dark / Flying / Fire

[SET COMMENTS]

* Yveltal's amazing STAB combination in conjunction with Life Orb makes it a potent wallbreaker for balance, bulky offense and hyper offense teams alike. It also carries useful defensive traits, against Pokemon such as Ultra Necrozma, Deoxys-A and Marshadow, despite it being weak to Stealth Rock, which makes it more flexible in-game compared to other wallbreakers like the aforementioned Deoxys-A.
* Oblivion Wing provides Yveltal with a source of longevity, making up for its Stealth Rock weakness and the Life Orb recoil it takes, while being useful against foes such as Marshadow, Arceus-Fairy and Alomomola. Taunt allows Yveltal to punish more passive Pokemon, such as Coil Zygarde, Ferrothorn and the aforementioned Alomomola, letting it avoid status conditions such as paralysis or Toxic, while preventing any setup opportunities from the former as well as Necrozma-DM. (Keeps Webs up too for HO)
* Sucker Punch allows Yveltal to revenge-kill Ultra Necrozma, Deoxys-A and Mega Mewtwo Y. Knock Off allows for better wallbreaking, notably removing Heavy-Duty Boots off of Ho-Oh and opposing defensive Yveltal, alongside removing Eviolite off of Chansey, all of which Yveltal's teammates can take advantage of. (I would emphasize how this move selection is very important, as it completely changes what Yveltal can and cannot beat. It especially depends on your team composition. One makes Yveltal valuable into offense, while the other is one of the hardest MUs for stall) Heat Wave should primarily be used with Tera Fire, but it allows Yveltal to snipe Zacian-C on Sticky Web hyper offense teams, removing one of Yveltal's sturdy checks.
* A Naive nature is preferred over Hasty since it allows Yveltal to withstand pressure from Marshadow more reliably. It also allows Yveltal to avoid the OHKO from Deoxys-A's Rock Slide even after Stealth Rock.
* Tera Dark is the primary Tera type on Yveltal, bringing its damage to all new heights. It notably lets Yveltal OHKO Eruption Primal Groudon and Marshadow, and 2HKO defensive Primal Kyogre and Ho-Oh, all with Dark Pulse. It also lets Yveltal more reliably OHKO Ultra Necrozma with Sucker Punch, whilst removing its weakness to Stealth Rock, giving Yveltal more longevity despite struggling more against Marshadow.
* Tera Flying boosts the power of Oblivion Wing, letting Yveltal 2HKO defensive Yveltal, Arceus-Fairy after Stealth Rock, and having a small chance to 2HKO Calm Mind Arceus-Dark after Stealth Rock too. Removing the Dark-type from Yveltal is especially useful to punish Arceus-Fairy harder. Tera Fire boosts Heat Wave to OHKO Zacian-C, while letting Yveltal more safely deal with defensive Ho-Oh and the aforementioned Arceus-Fairy, although it does not let Yveltal muscle through the latter like Tera Flying does. (Specify Tera Fire should only be used on webs. Emphasize the importance of Tera Fire vs. defensive Ho-Oh, as it allows Yveltal to beat it 1 v 1, which is essential to keeping webs up)
* All three status conditions can hinder Yveltal significantly. Toxic from Eternatus and defensive Arceus-Dark reduces Yveltal's longevity drastically, while Oblivion Wing struggles to make up for it. Paralysis from Zygarde and Giratina-O means Yveltal cannot outspeed bulky targets anymore, notably Primal Groudon, Ho-Oh and Zygarde. Burns from Ho-Oh weakens Sucker Punch and Knock Off, notably preventing the former from OHKOing Mega Mewtwo Y, while the latter 3HKOes Chansey even without Eviolite. This is why it is ideal to avoid status conditions as much as possible, and avoid coming directly into opponents, especially since Yveltal has poor longevity. (The transition from this bullet to the next is awkward. I would reword it in some way so the next bullet doesn’t need to start with however.)
* However, Yveltal can punish moves it is immune to, such as Precipice Blades from Primal Groudon or Photon Geyser from Ultra Necrozma (Can only punish if it’s Sucker Punch. Specify or replace the example with Psyshock Lunala or something.) , so making aggressive plays can be beneficial, since it lets Yveltal break defensive cores in the early-to-mid game (Worded a bit weird. Specifically aggressive plays can provide free switch-ins, which allows Yveltal to wallbreak earlier than usual), where its teammates can clean up afterwards. (Specify that making such maneuvers are HIGHLY dependent on how that battle is going and who is currently on the field [Such as if Eternatus is currently in the field a switch could be reasonable. Something such as Arceus-Fairy could be possibly targeted with Overheat] We don’t want to advise players to randomly switch Yveltal into Primal Groudon all the time during a game)
* Yveltal struggles immensely against Calm Mind Arceus-Dark, Arceus-Fairy, defensive Eternatus and Fezandipiti. On hyper offense teams, Zacian-C handles all four of these, while Sticky Web support from Smeargle or Shuckle helps Yveltal prevent Arceus-Dark from setting up on it via Taunt; the former also removes Stealth Rock with Mortal Spin, assisting in Yveltal's longevity. (Mention Meteor Beam Eternatus helping vs. Ho-Oh and how they break Primal Groudon / Kyogre together.)
* On bulky offense and balance teams, Primal Groudon is a great partner, since while it appreciates Yveltal breaking past Zygarde and Giratina-O, it can check Arceus-Fairy and Zacian-C, while supporting Yveltal with Stealth Rock support. Ho-Oh is a similar case, but helps Yveltal's longevity with Defog support, while potentially weakening foes such as Eternatus with Thunder Wave, for Yveltal to punish later. (Mention some offensive allies that help with CM Arc-formes and Fez such as Zacian-C, Marshadow, and DD Necrozma-DM)

[SET CREDITS]
Written by:
https://www.smogon.com/forums/members/sami.604820/
Quality checked by:
https://www.smogon.com/forums/members/anchor9.652323/
https://www.smogon.com/forums/members/user3.103/
Grammar checked by:
https://www.smogon.com/forums/members/user4.104/
 
I'd like this to get a QC3 after you apply this QC. It feels somewhere between WIP and QC1 currently and for such an important mon I'd like another set of eyes on it. The information and foundation is great! However, it needs more info. LO Yveltal has warped the metagame around itself and the variety within this one set changes how it plays and the teams it fits on. I'd rather be thorough given how important this analysis is.

Also if you'd like this works as a secondary spread (Tera type does not matter, but poison can be mentioned)
EVs: 32 HP / 8 Def / 236 SpA / 8 SpD / 224 Spe
Nature: Timid
Tera Type: Dark / Flying / Poison
What the EVs do:

Speed: Still outspeeds base 95s, but is outsped by Lunala
Bulk - Survives:
Defensive Primal Groudon Overheat after 1 round of LO chip
Survives CB Ray Dragon Ascent
Survives uninvested Arceus-Fairy Judgment after 1 round of LO chip
Survives defensive Primal Kyogre Ice Beam after Stealth Rock and 1 round of LO Chip
Survives +1 Zacian-C Wild Charge
Survives Choice Specs Lunala Moonblast

If you use this please give me a set credit.

[SET]
name: Specially Offensive
move 1: Dark Pulse
move 2: Oblivion Wing
move 3: Taunt
move 4: Sucker Punch / Knock Off / Heat Wave
item: Life Orb
ability: Dark Aura
nature: Naive
evs: 4 Atk / 252 SpA / 252 Spe
tera type: Dark / Flying / Fire

[SET COMMENTS]

* Yveltal's amazing STAB combination in conjunction with Life Orb makes it a potent wallbreaker and stallbreaker for balance, bulky offense and hyper offense teams alike. It also carries useful defensive traits, against Pokemon such as Ultra Necrozma, Deoxys-A and Marshadow, despite it being weak to Stealth Rock, which makes it more flexible in-game compared to other wallbreakers like the aforementioned Deoxys-A. This just seems way too bare bones for LO Yveltal's place in the metagame. Its mandatory status on Sticky Web teams should be mentioned. Also touch on why it is able to fit on so many different playstyles (moveset variety / tera variety / multiple roles it is able to compress). The Deoxys-A mention is out of place unless you're using it as a mixed wallbreaker to compare it to. Yveltal's Speed tier should be mentioned as it plays a pretty big factor in how good it is between outspeeding the base 90s and the other mid speed wallbreakers. You could also mention its STAB combo is unresisted outside of Zacian-C.
* Oblivion Wing provides Yveltal with a source of longevity, making up for its Stealth Rock weakness and the Life Orb recoil it takes, while being useful against foes such as Marshadow, Arceus-Dark, Arceus-Fairy and Alomomola. Taunt allows Yveltal to punish more passive Pokemon, such as Coil Zygarde, Ferrothorn and the aforementioned Alomomola, letting it avoid status conditions such as paralysis or Toxic, while preventing any setup opportunities from the former as well as Necrozma-DM. It also ensures hazards such as Sticky Webs stay up against common Defog users such as Ho-Oh and Giratina-O. Mention how it enables it beat Arceus formes while webs are up. It is also probably worth mentioning that Taunt should never be dropped as it is a key tool for maintaining progress. There is enough to talk about with Taunt that it probably deserves its own bullet point.
* Sucker Punch allows Yveltal to revenge-kill Ultra Necrozma after a single layer of Spikes, Deoxys-A and Mega Mewtwo Y, making Yveltal good at handling opposing offense teams. Knock Off allows for better wallbreaking against balance and stall teams, notably removing Heavy-Duty Boots off of Ho-Oh and opposing defensive Yveltal, alongside removing Eviolite off of Chansey, all of which Yveltal's teammates can take advantage ofYveltal takes advantage of this as well due to the increased recovery from Oblivion Wing ofsetting Seimic Toss damage. Heat Wave should only primarily be used with Tera Fire, but it allows Yveltal to snipe Zacian-C on Sticky Web hyper offense teams, removing one of Yveltal's sturdy checks. Clarify how niche this is, it is only useful on HO and mostly Sticky Web at that where it is still niche. It needs Tera Fire to OHKO and it still usually isn't worth running. It comes with a signifcant cost to run.
* A Naive nature is preferred over Hasty since it allows Yveltal to withstand pressure from Marshadow more reliably. It also allows Yveltal to avoid the OHKO from Deoxys-A's Rock Slide even after Stealth Rock.
* Tera Dark is the primary Tera type on Yveltal, bringing its damage to all new heights. It notably lets Yveltal OHKO Eruption Primal Groudon and Marshadownot really sure why Marshadow is relevant when it OHKOes with Oblivion Wing already, and 2HKO defensive Primal Kyogre and Ho-Oh, all with Dark Pulse. It also lets Yveltal more reliably OHKO Ultra Necrozma with Sucker Punch, whilst removing its weakness to Stealth Rock, giving Yveltal more longevity despite struggling more against Marshadow. I'm not really sure why it struggles more with Marshadow? Imo Tera Dark is generally a waste if you are not running Sucker Punch.
* Tera Flying boosts the power of Oblivion Wing, letting Yveltal 2HKO defensive Yveltal, Arceus-Fairy after Stealth Rock, and having a small chance to 2HKO Calm Mind Arceus-Dark after Stealth Rock too. Removing the Dark-type from Yveltal is especially useful to punish Arceus-Fairy harderPhrasing, but it is worth mentioning that it lets Yveltal easily muscle through Calm Mind Arceus formes, especially under Sticky Web. Mention the defensive drawbacks more as well (i.e. Shadow Sneak hits for neutral). Tera Fire boosts Heat Wave to OHKO Zacian-C, while letting Yveltal more safely deal with defensive Ho-Oh and the aforementioned Arceus-Fairy, although it does not let Yveltal muscle through the latter like Tera Flying does. Tera Fire should only be used on Sticky Webs teams however, since that's only where Heat Wave is useful. Reword this because it should usually be Tera Fire on Sticky Web teams regardless of whether it runs Heat Wave or not. Safely dealing with defensive Ho-Oh and Arceus-Fairy is an understatement, it completely walls them while Oblivion Wing keeps it healthy.
* All three status conditions can hinder Yveltal significantly. Toxic from Eternatus and defensive Arceus-Dark reduces Yveltal's longevity drastically, while Oblivion Wing struggles to make up for it. Paralysis from Zygarde and Giratina-O means Yveltal cannot outspeed bulky targets anymore, notably Primal Groudon, Ho-Oh and Zygarde. Burns from Ho-Oh weakens Sucker Punch and Knock Off, notably preventing the former from OHKOing Mega Mewtwo Y, while the latter 3HKOes Chansey even without Eviolite. This is why it is ideal to avoid status conditions as much as possible, and avoid coming directly into opponents, especially since Yveltal has poor longevity. This sentence should be at the beginning as Yveltal can Taunt most of these. It is probably worth mentioning that Rock-type coverage and Overheat make switching into Primal Groudon risky. Also I'd emphasize how crippling Burn is for Sucker Punch sets as Knock Off sets don't care nearly as much as the benefit comes more from the item removal than the damage.
* Yveltal works best in the early-to-mid game, where it is able to break through physically defensive walls such as Primal Groudon and Zygarde for its teammates. While it appreciates pivot support from Pokemon such as Alomomola and Landorus-T, Yveltal can be used aggressively against moves it is immune to, such as Primal Groudon's Precipice Blades, or Lunala's Psyshock; this is extremely risky however, and it is not ideal to do this frequently since Yveltal is easy to punish via Overheat from Primal Groudon, or Moonblast from Lunala. Both Overheat and Moonblast OHKO after one round of Life Orb chip so this should be emphasized. Expand this to 2-3 bullets and discuss how Yveltal is used on different sorts of teams throughout the game (i.e on Webs and if it has Sucker or Knock)
* Yveltal struggles immensely against Calm Mind Arceus-Dark, Arceus-Fairy, defensive Eternatus and Fezandipiti. On hyper offense teams, Zacian-C handles all four of these, while Sticky Web support from Smeargle or Shuckle helps Yveltal prevent Arceus-Dark from setting up on it via Taunt; the former also removes Stealth Rock with Mortal Spin, assisting in Yveltal's longevity. It is worth mentioning that Yveltal beats both Arceus-Dark and Arceus-Fairy if Sticky Webs are up. Meteor Beam Eternatus is able to break past Arceus-Fairy and opposing Eternatus, while sniping Ho-Oh with Meteor Beam, while appreciating Yveltal breaking through Necrozma-DM. Mention how Zacian-C appreciates Yveltals ability to break stall. Zacian-C also helps against Extreme Killer Arceus. Probably worth mentioning Chi-Yu for webs teams as well and how they synergize to wallbreak and maintain Sticky Webs.
* On bulky offense and balance teams, Primal Groudon is a great partner, since while it appreciates Yveltal breaking past Zygarde and Giratina-Ofrom what you've said earlier it should not switch in so this reads as confusing, it can check Arceus-Fairy and Zacian-C, while supporting Yveltal with entry hazards Stealth Rock support. Offensive Ho-Oh is a similar case, but helps Yveltal's longevity with Defog support, while potentially weakening foes such as Eternatus with Thunder Wave, for Yveltal to punish laterIt is worth mentioning that Yveltal is weaker to Stealth Rock than almost any individual Pokemon and Ho-Oh' hard checking CM Arceus-Dark and Arceus-Fairy for Yveltal . Dragon Dance Necrozma-DM and Zygarde appreciate Yveltal breaking common defensive walls such as Primal Groudon, Coil Zygarde and Giratina-O for their late-game sweeps. Probably worth mentioning Zygarde as a partner (both sets)

[SET CREDITS]
Written by:
https://www.smogon.com/forums/members/sami.604820/
Quality checked by:
https://www.smogon.com/forums/members/anchor9.652323/
https://www.smogon.com/forums/members/user3.103/
Grammar checked by:
https://www.smogon.com/forums/members/user4.104/
 
May as well try QCing this so it goes somewhere
Notify me when it's applied so I can then corroborate for a stamp

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[SET]
name: Specially Offensive
move 1: Dark Pulse
move 2: Oblivion Wing
move 3: Taunt
move 4: Sucker Punch / Knock Off / Heat Wave
item: Life Orb
ability: Dark Aura
nature: Naive / Timid
evs: 4 Atk / 252 SpA / 252 Spe or 32 HP / 8 Def / 236 SpA / 8 SpD / 224 Spe please add bumboclaat's stuff, it was discussed for months and overall it's a neat addition
tera type: Dark / Flying / Fire

[SET COMMENTS]

* Yveltal's amazing STAB combination, which is only resisted by Zacian-C and far more niche Pokemon like Mega Diancie, in conjunction with Life Orb makes it a potent wallbreaker and stallbreaker for balance, bulky offense and hyper offense teams alike; to the point where it is deemed mandatory on Sticky Web teams due to its efficiency and role compression as a source of priority, strong damage-dealer, and its sheer variety versatility fits better here as it's way more of a case of quality over quantity moveset-wise, generally analyses focus on the set over the Pokemon as a whole, unless you mean this bit regarding bluffing potential, which should then be noted instead in that case if so with its movepool and Terastallization options. Yveltal's speed Speed fix other instances of this tier outside of Sticky Webs is also fantastic, outspeeding the majority of the defensive metagame such as Primal Groudon, Zygarde and Ho-Oh, only being outsped by Calm Mind Arceus formes. It also carries useful defensive traits, against Pokemon such as Ultra Necrozma, Deoxys-A and Marshadow, despite it being weak to Stealth Rock, which makes it more flexible in-game compared to other wallbreakers like the aforementioned Deoxys-A and Rayquaza, who rely much more on pivot support and revenge-killing oppurtunities.
* Oblivion Wing provides Yveltal with a source of longevity, making up for its Stealth Rock weakness and the Life Orb recoil it takes, while being useful against foes such as Marshadow, Alomomola, Arceus-Fairy and Arceus-Dark, with Oblivion Wing being needed to beat the latter under Sticky Web.
* Taunt is mandatory on Yveltal since it allows to make progress much more easily, by punishing more passive Pokemon such as Coil Zygarde, Ferrothorn and Alomomola, letting it avoid status conditions such as paralysis or Toxic, while preventing any setup opportunities from the former as well as Necrozma-DM. It also ensures hazards such as Sticky Webs stay up against common Defog users such as Ho-Oh and Giratina-O.
* Sucker Punch allows Yveltal to revenge-kill Ultra Necrozma after a single layer of Spikes, Deoxys-A and Mega Mewtwo Y, making Yveltal good at handling opposing offense teams. Knock Off allows for better wallbreaking against balance and stall teams, notably removing Heavy-Duty Boots off of Ho-Oh and opposing defensive Yveltal, alongside removing Eviolite off of Chansey, all of which Yveltal's teammates can take advantage of. Heat Wave should only be used with Tera Fire, but it allows Yveltal to snipe Zacian-C, removing one of Yveltal's sturdy checks, but is significantly less useful than the other two options, since it is locked to Sticky Web teams for Yveltal to actually outspeed Zacian-C.
* A Naive nature is preferred over Hasty since it allows Yveltal to withstand pressure from Marshadow more reliably. It also allows Yveltal to avoid the OHKO from Deoxys-A's Rock Slide even after Stealth Rock. This should be rewritten to account for the other secondary spread, describing what it does as explained in bumboclaat's post
* Tera Dark is the primary Tera type on Yveltal, bringing its damage to all new heights. It notably lets Yveltal OHKO Eruption Primal Groudon and Rayquaza, and 2HKO defensive Primal Kyogre and Ho-Oh, all with Dark Pulse. It also lets Yveltal more reliably OHKO Ultra Necrozma with Sucker Punch, whilst removing its weakness to Stealth Rock, giving Yveltal more longevity despite struggling slightly more against Marshadow, since it is no longer neutral to Low Kick.
* Tera Flying boosts the power of Oblivion Wing, letting Yveltal 2HKO defensive Yveltal, Arceus-Fairy after Stealth Rock, and having a small chance to 2HKO Calm Mind Arceus-Dark after Stealth Rock too, letting Yveltal muscle through these Calm Mind Arceus formes under Sticky Web. Removing the Dark-type from Yveltal is especially useful to punish Arceus-Fairy harder, although Yveltal no longer resists Ghost-type attacks from Marshadow and Lunala. Tera Fire boosts Heat Wave to OHKO Zacian-C, while letting Yveltal more safely deal with defensive Ho-Oh and the aforementioned Arceus-Fairy, and although it does not let Yveltal muscle through the latter like Tera Flying does, Yveltal still walls it with the recovery from Oblivion Wing. Tera Fire should only be used on Sticky Webs teams however, since that's only where Heat Wave is useful, and beating Ho-Oh and Arceus-Fairy is only more effective when it outspeeds the latter, and when its encouraged to Taunt more against the former to maintain Sticky Web.
* It is ideal to avoid status conditions as much as possible, especially since Yveltal has poor longevity. All three Most it seems Heat Wave sets don't concern themselves with burns that much status conditions can hinder Yveltal significantly. Toxic from Eternatus and defensive Arceus-Dark reduces Yveltal's longevity drastically, while Oblivion Wing struggles to make up for it. Paralysis from Zygarde and Giratina-O means Yveltal cannot outspeed bulky targets anymore, notably Primal Groudon, Ho-Oh and Zygarde. Burns from Ho-Oh drastically weakens Sucker Punch and Knock Off, notably preventing the former from OHKOing Mega Mewtwo Y and Ultra Necrozma, even with Tera Dark for just the latter.
* Yveltal works best in the early-to-mid game, where it is able to break through physically defensive walls such as Primal Groudon and Zygarde for its teammates. While it appreciates pivot support from Pokemon such as Alomomola and Landorus-T, Yveltal can be used aggressively against moves it is immune to, such as Primal Groudon's Precipice Blades, or Lunala's Psyshock; this is extremely risky however, and it is not ideal to do this frequently since Yveltal is easy to kill via Overheat from Primal Groudon, or Moonblast from Lunala, both OHKOing after one round of Life Orb damage.
* On Sticky Web teams, wallbreaking is Yveltal's main purpose for its team, and so it should be used in the early game to break through physically defensive walls such as Primal Groudon and Zygarde, all while maintaing Sticky Web and other hazards against Defog users such as Giratina-O and Ho-Oh with Taunt.
* Outside of hyper offense teams, Yveltal should be preserved due to its poor longevity, and it heavily appreciates pivot support from Alomomola and Landorus-T. While it can come in aggressively against moves it is immune to, such as Primal Groudon's Precipice Blades or Lunala's Psyshock, this is heavily risky, since Yveltal is easy to punish, since other moves may be able to OHKO Yveltal, such as Primal Groudon's Overheat or Lunala's Moonblast both OHKOing after one round of Life Orb damage.
* Against teams with Ultra Necrozma, Deoxys-A and Mega Mewtwo Y, it is necessary to preserve Sucker Punch Yveltal in order to revenge-kill these threats, and prevent them from getting out of hand. If Yveltal is running Knock Off instead, not only is it important to run a secondary form of priority, such as Marshadow's Shadow Sneak, but Yveltal may want to play more aggressively with double-switches to stop these threats from setting up safely, as well as to wallbreak harder against defensive cores including Ho-Oh, Eternatus and Zygarde.
* Yveltal struggles immensely against Calm Mind Arceus-Dark, Arceus-Fairy, defensive Eternatus and Fezandipiti. On hyper offense teams, Zacian-C handles all four of these, appreciating Yveltal breaking through Primal Groudon and Dondozo for it in return. Sticky Web support from Smeargle or Shuckle helps Yveltal prevent Arceus-Dark from setting up on it via Taunt and Calm Mind, letting Yveltal beat it one-on-one, and even Arceus-Fairy with Tera Flying or Fire; Smeargle also removes Stealth Rock with Mortal Spin, assisting in Yveltal's longevity. Meteor Beam Eternatus is able to break past Arceus-Fairy and opposing Eternatus, while sniping Ho-Oh with Meteor Beam, while appreciating Yveltal breaking through Necrozma-DM. Finally, Chi-Yu can help overwhelm common checks with Yveltal, such as Arceus-Fairy and Eternatus, while it too has Taunt to maintain Sticky Webs Sticky Web fix other instances of this.
* On bulky offense and balance teams, Primal Groudon is a great partner, since while it appreciates Yveltal breaking past Zygarde and Giratina-O for it, Primal Groudon can check Arceus-Fairy and Zacian-C, while supporting Yveltal with entry hazards. Offensive Ho-Oh is a similar case, checking Arceus-Fairy and Arceus-Dark, but it helps Yveltal's weakness to Stealth Rock with Defog support, while potentially weakening foes such as Eternatus with Thunder Wave, for Yveltal to punish later. Dragon Dance Necrozma-DM and Zygarde appreciate Yveltal breaking common defensive walls such as Primal Groudon, Coil Zygarde and Giratina-O for their late-game sweeps, while Coil Zygarde is useful for paralysis support and as a blanket check to physical threats such as Primal Groudon and offensive Ho-Oh that may want to trade with Yveltal.

[SET CREDITS]
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[SET]
name: Specially Offensive
move 1: Dark Pulse
move 2: Oblivion Wing
move 3: Taunt
move 4: Sucker Punch / Knock Off / Heat Wave
item: Life Orb
ability: Dark Aura
nature: Naive / Timid
evs: 4 Atk / 252 SpA / 252 Spe or 32 HP / 8 Def / 236 SpA / 8 SpD / 224 Spe
tera type: Dark / Flying / Fire

[SET COMMENTS]

* Yveltal's amazing STAB combination, which is only resisted by Zacian-C and far more niche Pokemon like Mega Diancie, in conjunction with Life Orb makes it a potent wallbreaker and stallbreaker for balance, bulky offense and hyper offense teams alike; to the point where it is deemed mandatory on Sticky Web teams due to its efficiency and role compression as a source of priority, strong damage-dealer, and its sheer versatility with its movepool and Terastallization options. Yveltal's Speed tier outside of Sticky Web is also fantastic, outspeeding the majority of the defensive metagame such as Primal Groudon, Zygarde and Ho-Oh, only being outsped by Calm Mind Arceus formes and Eternatus. It also carries useful defensive traits, against Pokemon such as Ultra Necrozma, Deoxys-A and Marshadow, despite it being weak to Stealth Rock, which makes it more flexible in-game compared to other wallbreakers like the aforementioned Deoxys-A and Rayquaza, who rely much more on pivot support and revenge-killing oppurtunities. Would mention that Yveltal takes the best of both worlds in that it is a good wallbreaker that is good against offense unlike Rayquaza and can switch-in to stuff thanks to solid bulk unlike Deoxys-A and is not prediction reliant.
* Oblivion Wing provides Yveltal with a source of longevity, making up for its Stealth Rock weakness and the Life Orb recoil it takes, while being useful against foes such as Marshadow, Alomomola, Arceus-Fairy and Arceus-Dark, with Oblivion Wing being needed to beat the latter under Sticky Web.
* Taunt is mandatory on Yveltal since it allows to make progress much more easily, by punishing more passive Pokemon such as Coil Zygarde, Ferrothorn and Alomomola, letting it avoid status conditions such as paralysis or Toxic, while preventing any setup opportunities from the former as well as Necrozma-DM. It also ensures hazards such as Sticky Web stay up against common Defog users such as Ho-Oh and Giratina-O. Might be worth mentioning that offensive Ho-Oh can trade v Yveltal or remove webs with team support, but Yveltal completely blanks defensive Ho-Oh, especially with tera fire. Also Taunt is great v most of Yveltal's switch-ins from locking Arceus formes and Eternatus out of Recover to preventing Zacian-C from using Swords Dance.
* Sucker Punch allows Yveltal to revenge-kill Ultra Necrozma after a single layer of Spikes, Deoxys-A and Mega Mewtwo Y, making Yveltal good at handling opposing offense teams. Knock Off allows for better wallbreaking against balance and stall teams, notably removing Heavy-Duty Boots off of Ho-Oh and opposing defensive Yveltal, alongside removing Eviolite off of Chansey, all of which Yveltal's teammates can take advantage of. Heat Wave should only be used with Tera Fire, but it allows Yveltal to snipe Zacian-C, removing one of Yveltal's sturdy checks, but is significantly less useful than the other two options, since it is locked to Sticky Web teams for Yveltal to actually outspeed Zacian-C. This would read better if mentioning that this is only for webs teams is at the beginning
* A Naive nature is preferred over Hasty on the standard spread, since it allows Yveltal to withstand pressure from Marshadow more reliably. It also allows Yveltal to avoid the OHKO from Deoxys-A's Rock Slide even after Stealth Rock. The secondary EV spread allows Yveltal to avoid the OHKO from Choice Band Rayquaza's Dragon Ascent and Zacian-C's Wild Charge, the OHKO from Choice Specs Lunala's Moonblast and uninvested Arceus-Fairy's Judgment after one round of Life Orb recoil, as well as the OHKO from defensive Primal Groudon's Overheat after one round of Life Orb recoil, and the OHKO from defensive Primal Kyogre's Ice Beam after Stealth Rock, all while outspeeding base 95s such as Rayquaza and Kyurem-B, at the cost of not outspeeding Lunala anymore. Worth mentioning that if Sucker Punh is run with this spread Tera Dark is needed otherwise it doesn't matter. Knock Off is just for utility so it doesn't need the damage boost.
* Tera Dark is the primary Tera type on Yveltal, bringing its damage to all new heights. It notably lets Yveltal OHKO Eruption Primal Groudon and Rayquaza, and 2HKO defensive Primal Kyogre and Ho-Oh, all with Dark Pulse. It also lets Yveltal more reliably OHKO Ultra Necrozma with Sucker Punch, whilst removing its weakness to Stealth Rock, giving Yveltal more longevity despite struggling slightly more against Marshadow, since it is no longer neutral to Low Kick.
* Tera Flying boosts the power of Oblivion Wing, letting Yveltal 2HKO defensive Yveltal, Arceus-Fairy after Stealth Rock, and having a small chance to 2HKO Calm Mind Arceus-Dark after Stealth Rock too, letting Yveltal muscle through these Calm Mind Arceus formes under Sticky Web. Removing the Dark-type from Yveltal is especially useful to punish Arceus-Fairy harder, although Yveltal no longer resists Ghost-type attacks from Marshadow and Lunala. Tera Fire boosts Heat Wave to OHKO Zacian-C, while letting Yveltal more safely deal with defensive Ho-Oh and the aforementioned Arceus-Fairy, and although it does not let Yveltal muscle through the latter like Tera Flying does, Yveltal still walls it with the recovery from Oblivion WingIt beats both with Tera Fire? Do you mean offensive Ho-Oh? . Tera Fire should only be used on Sticky Web teams however, since that's only where Heat Wave is useful, and beating Ho-Oh and Arceus-Fairy is only more effective when it outspeeds the latter, and when its encouraged to Taunt more against the former to maintain Sticky Web.
* It is ideal to avoid status conditions as much as possible, especially since Yveltal has poor longevity. Most status conditions can hinder Yveltal significantly. Toxic from Eternatus and defensive Arceus-Dark reduces Yveltal's longevity drastically, while Oblivion Wing struggles to make up for it. Paralysis from Zygarde and Giratina-O means Yveltal cannot outspeed bulky targets anymore, notably Primal Groudon, Ho-Oh and Zygarde. Burns from Ho-Oh drastically weakens Sucker Punch and Knock Offdon't find the knock reduction to be that big personally, notably preventing the former from OHKOing Mega Mewtwo Y and Ultra Necrozma, even with Tera Dark for just the latter, although this weakness is heavily mitigated for Tera Fire variants. Its worth specifying that this makes switching into Giratina-O, a Pokemon Yveltal crushes, risky. Its sort of mentioned, but worth its own sentence given how much of a threat LO Yv is to Tina-O structures, especially with webs up (probably worth mentioning it often 6-0s if webs are up).
* Yveltal works best in the early-to-mid game, where it is able to break through physically defensive walls such as Primal Groudon and Zygarde for its teammates. While it appreciates pivot support from Pokemon such as Alomomola and Landorus-T, Yveltal can be used aggressively against moves it is immune to, such as Primal Groudon's Precipice Blades, or Lunala's Psyshock; this is extremely risky however, and it is not ideal to do this frequently since Yveltal is easy to kill via Overheat from Primal Groudon, or Moonblast from Lunala, both OHKOing after one round of Life Orb damage.
* On Sticky Web teams, wallbreaking is Yveltal's main purpose for its team, and so it should be used in the early game to break through physically defensive walls such as Primal Groudon and Zygarde, all while maintaing Sticky Web and other hazards against Defog users such as Giratina-O and Ho-Oh with Taunt.
* Outside of hyper offense teams, Yveltal should be preserved due to its poor longevity, and it heavilyit isn't a mon that requires a pivot to get in like Pao appreciates pivot support from Alomomolawould drop because Alo teams already have issues w Taunt CM Arceus formes and offensive Eternatus w/o LO Yveltal and Landorus-T. While it can come in aggressively against moves it is immune to, such as Primal Groudon's Precipice Blades or Lunala's Psyshock, this is heavily risky, since Yveltal is easy to punish, since other moves may be able to OHKO Yveltal, such as Primal Groudon's Overheat or Lunala's Moonblast both OHKOing after one round of Life Orb damage.
* Against teams with Ultra Necrozma, Deoxys-A and Mega Mewtwo Y, it is necessary to preserve Sucker Punch Yveltal in order to revenge-kill these threats, and prevent them from getting out of hand. If Yveltal is running Knock Off instead, not only is it important to run another secondary secondary is odd phrasing if Yveltal is running Knock (could add ekiller on HO as well if you wanted) form of priority, such as Marshadow's Shadow Sneak, but Yveltal may want to play more aggressively with double-switches to stop these threats from setting up safely, as well as to wallbreak harder against defensive cores including Ho-Oh, Eternatus and Zygarde.
* Yveltal is walled by struggles immensely against Calm Mind Arceus-Dark, Arceus-Fairy, defensive Eternatus and Fezandipiti. On hyperworks fine on bo as well offense teams, Zacian-Cis it worth specifying behemoth blade cc? mention its defensive utility v ekiller though handles all four of these, appreciating Yveltal breaking through Primal Groudon and Dondozo for it in return. Sticky Web support from Smeargle or Shuckle helps Yveltal prevent Calm Mind Arceus-Dark from setting up on it via Taunt and Calm Mind, letting Yveltal beat it one-on-one, and even Arceus-Fairy with Tera Flying or Fire; Smeargle also removes Stealth Rock with Mortal Spin, assisting in Yveltal's longevity. Meteor Beam Eternatus is able to break past Arceus-Fairy and opposing Eternatus, while sniping Ho-Oh with Meteor Beam, while appreciating Yveltal breaking through Necrozma-DM. Finally, Chi-Yu can help overwhelm common checks with Yveltal, such as Arceus-Fairy and Eternatus, while it too has Taunt to maintain Sticky Web. Could mention that Chi-Yu's stallbreaking and wallbreaking capabilities make it easier to run Sucker Punch to help with the offense that Chi-Yu can struggle with.
* On bulky offense and balance teams, Primal Groudon is a great partner, since while it appreciates Yveltal breaking past Zygarde and Giratina-O for it, Primal Groudon can check Arceus-Fairy and Zacian-C, while supporting Yveltal with entry hazardscould mention it appreciates Primal Groudon handling Primal Kyogre as well. Offensive Ho-Oh is a similar case, checking Arceus-Fairy and Arceus-Dark, but it helps Yveltal's weakness to Stealth Rock with Defog support, while potentially weakening foes such as Eternatus with Thunder Wave, for Yveltal to punish later. Dragon Dance Necrozma-DM and Coil or DD? Zygarde appreciate Yveltal breaking common defensive walls such as Primal Groudon, Coil Zygarde and Giratina-O for their late-game sweeps, while Coil Zygarde is useful for paralysis support and as a blanket check to physical threats such as Primal Groudon and offensive Ho-Oh that may want to trade with Yveltal. Since both Coil Zygarde and offensive Ho-Oh are in this bullet mentioning that one is able to phase while the other offers paralysis support is great flexibility in the builder that helps the rest of the team. I.e. It'll be pdon/ho-oh/arc/zyg/yv/+1 and depending on the +1 one might prefer that ho-oh phases and another might prefer that Zygarde does.

[SET CREDITS]
Written by:
https://www.smogon.com/forums/members/sami.604820/
Quality checked by:
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https://www.smogon.com/forums/members/bumboclaat.523420/
https://www.smogon.com/forums/members/bobsican.434487/
Set(s) by:
https://www.smogon.com/forums/members/bumboclaat.523420/
Grammar checked by:
https://www.smogon.com/forums/members/user4.104/
 
Two things I forgot to mention, but putting them in a comment in case you're currently applying the QC. The first would be mentioning that Tera Fire is the preferred tera type on Sticky Web structures, even without Heat Wave, as it helps a lot in maintaining the webs against defensive Ho-Oh and particularly against Arceus-Fairy structures. It hits hard enough as is without the boost. The second is a few lines explaining why a + Speed instead of + SpA nature is used. This is mostly due to the target audience of analysis as Modest / Rash seems alluring, but Yveltal already hits hard enough and its Speed plays a pretty signifcant role in enabling it to perform its duties consistently. The damage boost may be nice, but it isn't worth the cost of being outsped by every other midspeed breaker (they can all ohko it), max speed Primals, and more niche Pokemon such as Kyurem-B and Zekrom. I'd add Bold Arceus formes, but once the dex revamp is done I'm not sure any will feature a Bold nature outside of maybe defensive Arceus-Dark.
 
My check on this is in-progress but I ran into a bit of a problem on this bullet point:
A Naive nature is preferred over Hasty on the standard spread, since it allows Yveltal to withstand pressure from Marshadow more reliably. It also allows Yveltal to avoid the OHKO from Deoxys-A's Rock Slide even after Stealth Rock. The secondary EV spread allows Yveltal to avoid the OHKO from Choice Band Rayquaza's Dragon Ascent and Zacian-C's Wild Charge, the OHKO from Choice Specs Lunala's Moonblast and uninvested Arceus-Fairy's Judgment after one round of Life Orb recoil, as well as the OHKO from defensive Primal Groudon's Overheat after one round of Life Orb recoil, and the OHKO from defensive Primal Kyogre's Ice Beam after Stealth Rock, all while outspeeding base 95s such as Rayquaza and Kyurem-B, at the cost of not outspeeding Lunala anymore. A Modest nature is not encouraged since outspeeding Rayquaza on Sticky Web teams, as well as maximum Speed Primal Groudon and Primal Kyogre, Kyurem-B and Zekrom outside of Sticky Web, is heavily important to Yveltal's effectiveness as a wallbreaker.
Could you please provide a clearer list of what benchmarks the secondary spread avoids? It is impossible to parse. My understanding is:

Avoid OHKO with no recoil / rocks chip
- Choice Band Rayquaza's Dragon Ascent
- Zacian-C's Wild Charge
Avoid OHKO with one round of LO recoil
- Choice Specs Lunala's Moonblast
- uninvested Arceus-Fairy's Judgment
- defensive Primal Groudon's Overheat
Avoid OHKO despite Stealth Rock chip
- defensive Primal Kyogre's Ice Beam after Stealth Rock
 
Avoid OHKO with no recoil / rocks chip [lives both from full]
- Choice Band Rayquaza's Dragon Ascent
252 Atk Choice Band Rayquaza Dragon Ascent vs. 32 HP / 8 Def Yveltal: 339-399 (84.5 - 99.5%) -- guaranteed 2HKO
- Zacian-C's Wild Charge
+1 252 Atk Zacian-Crowned Wild Charge vs. 32 HP / 8 Def Yveltal: 340-400 (84.7 - 99.7%) -- guaranteed 2HKO

Avoid OHKO with one round of LO recoil [both correct]
- Choice Specs Lunala's Moonblast [lives from full - first spread is a flip to OHKO]
252 SpA Choice Specs Lunala Moonblast vs. 32 HP / 8 SpD Yveltal: 326-384 (81.2 - 95.7%) -- guaranteed 2HKO
252 SpA Choice Specs Lunala Moonblast vs. 0 HP / 0- SpD Yveltal: 366-432 (93.1 - 109.9%) -- 56.3% chance to OHKO

- uninvested Arceus-Fairy's Judgment [correct yeah]
0 SpA Pixie Plate Arceus-Fairy Judgment vs. 32 HP / 8 SpD Yveltal: 306-360 (76.3 - 89.7%) -- guaranteed 2HKO
0 SpA Pixie Plate Arceus-Fairy Judgment vs. 0 HP / 0- SpD Yveltal: 342-404 (87 - 102.7%) -- 18.8% chance to OHKO

- defensive Primal Groudon's Overheat [correct yeah]
0 SpA Groudon-Primal Overheat vs. 32 HP / 8 SpD Yveltal in Harsh Sunshine: 301-355 (75 - 88.5%) -- guaranteed 2HKO
0 SpA Groudon-Primal Overheat vs. 0 HP / 0- SpD Yveltal in Harsh Sunshine: 339-400 (86.2 - 101.7%) -- 12.5% chance to OHKO


Avoid OHKO despite Stealth Rock chip [Stealth Rock and the 10% LO Chip]
- defensive Primal Kyogre's Ice Beam after Stealth Rock
0 SpA Kyogre-Primal Ice Beam vs. 32 HP / 8 SpD Yveltal: 218-258 (54.3 - 64.3%) -- guaranteed 2HKO
0 SpA Kyogre-Primal Ice Beam vs. 0 HP / 0- SpD Yveltal: 246-290 (62.5 - 73.7%) -- guaranteed 2HKO
 
Sami given the relatively extensive scope of my edits here and the importance of this analysis I am going to ask that you implement this first before I stamp it. I may request a second GP check instead of taking a second look myself; fair warning. Let me know if you have any questions!

add remove comment
[SET]
name: Specially Offensive
move 1: Dark Pulse
move 2: Oblivion Wing
move 3: Taunt
move 4: Sucker Punch / Knock Off / Heat Wave
item: Life Orb
ability: Dark Aura
nature: Naive / Timid
evs: 4 Atk / 252 SpA / 252 Spe or 32 HP / 8 Def / 236 SpA / 8 SpD / 224 Spe
tera type: Dark / Flying / Fire

[SET COMMENTS]

* Yveltal's amazing STAB combination, which is only resisted by Zacian-C and far more niche Pokemon like Mega Diancie, in conjunction with Life Orb makes it a potent wallbreaker and stallbreaker for balance, bulky offense, (AC) and hyper offense teams alike (RSC). (AP) This is to the point where it is deemed mandatory on Sticky Web teams due to its efficiency and role compression as a source of priority, strong damage-dealer, and its sheer versatility with its movepool and Terastallization options. Yveltal's Speed tier outside of Sticky Web is also fantastic, outspeeding the majority of the defensive metagame such as Primal Groudon, Zygarde, (AC) and Ho-Oh, only being outsped by Calm Mind Arceus formes and Eternatus. It also carries useful defensive traits (RC) against Pokemon such as Ultra Necrozma, Deoxys-A, (AC) and Marshadow, despite it being weak to Stealth Rock (RC) which. (AP) This makes it more flexible in-game compared to other wallbreakers like the aforementioned Deoxys-A and Rayquaza, who which rely much more on pivot support and revenge-killing oppurtunities (RC) opportunities; this is all while simultaneously being good against opposing offense teams and not being prediction reliant.
* Oblivion Wing provides Yveltal with a source of longevity, making up for its Stealth Rock weakness and the Life Orb recoil it takes, while being useful against foes such as Marshadow, Alomomola, Arceus-Fairy, (AC) and Arceus-Dark, with Oblivion Wing being needed to beat the latter under Sticky Web.
* Taunt is mandatory on Yveltal since it allows it to make progress much more easily (RC) by punishing more passive Pokemon such as Coil Zygarde, Ferrothorn, (AC) and Alomomola (RC) letting. (AP) This lets it avoid status conditions such as paralysis or Toxic (RC) poison while preventing any setup opportunities from the former as well as Necrozma-DM Zygarde, Necrozma-DM, Arceus-Ground, and Zacian-C. idk why there are two separate setup mon lists but I am combining them for readability It also ensures that entry hazards such as Sticky Web stay up against common Defog users such as defensive Ho-Oh and Giratina-O, especially with Tera Fire for the former (RC) while it prevents setup from Arceus-Ground and Zacian-C as well. why is tera fire relevant here? is it because ho-oh is affected by the webs? or is it because yveltal is running tera fire and would be immune to burn? I would clarify that
* Sucker Punch allows Yveltal to revenge-kill revenge kill Ultra Necrozma after a single layer of Spikes, Deoxys-A, (AC) and Mega Mewtwo Y, to clarify, spikes is only relevant to ultra necrozma? making Yveltal good at handling opposing offense teams. Knock Off allows for better wallbreaking against balance and stall teams, notably removing Heavy-Duty Boots off of Ho-Oh and opposing defensive Yveltal, alongside removing Eviolite off of Chansey, all of which Yveltal's teammates can take advantage of. Heat Wave should only be used with Tera Fire (RC) and is locked to on Sticky Web teams, but it allows Yveltal to snipe Zacian-C after outspeeding it, implied removing one of Yveltal's sturdy checks, but it is significantly less useful than the other two options.
* A Naive nature is preferred over Hasty on the standard spread, since it allows Yveltal to withstand pressure from Marshadow more reliably. It also allows Yveltal to avoid the an OHKO from Deoxys-A's Rock Slide even after Stealth Rock chip. The secondary EV spread allows Yveltal to avoid the several OHKO from rolls, including: Choice Band Rayquaza's Dragon Ascent, (AC) and Zacian-C's Wild Charge, the OHKO from and Choice Specs Lunala's Moonblast; (ASC) and uninvested Arceus-Fairy's Judgment after one round of Life Orb recoil, as well as the OHKO from and defensive Primal Groudon's Overheat after one round of Life Orb recoil (RC); (ASC) and the OHKO from defensive Primal Kyogre's Ice Beam after Stealth Rock (RC) chip and Life Orb Recoil. This is all while still outspeeding base 95s base-95 Speed Pokemon such as Rayquaza and Kyurem-B, at the cost of not outspeeding Lunala anymore. A Modest nature is not encouraged since outspeeding Rayquaza on Sticky Web teams, as well as maximum Speed Primal Groudon and Primal Kyogre, Kyurem-B, (AC) and Zekrom if Kyurem-B and Zekrom are not max speed I would move them prior to PDon and POgre outside of Sticky Web, is heavily important to Yveltal's effectiveness as a wallbreaker.
* Tera Dark is the primary Tera type on Yveltal, bringing its damage to all new heights. It notably lets Yveltal OHKO Eruption Primal Groudon and Rayquaza (RC) and 2HKO defensive Primal Kyogre and Ho-Oh, all with Dark Pulse. It also lets Yveltal more reliably OHKO Ultra Necrozma with Sucker Punch, which is necessary for the second EV spread, (AC) which runs a Timid nature (RC) whilst removing its. (AP) Tera Dark also removes Yveltal's weakness to Stealth Rock, giving Yveltal it more longevity despite struggling slightly more against Marshadow, since it is no longer takes neutral to damage from Low Kick.
* Tera Flying boosts the power of Oblivion Wing, letting Yveltal 2HKO defensive Yveltal, Arceus-Fairy after Stealth Rock chip, and having a small chance to 2HKO Calm Mind Arceus-Dark after Stealth Rock chip too, letting Yveltal muscle through these Calm Mind redundant Arceus formes under Sticky Web. Removing the Dark-type from Yveltal is especially useful to punish Arceus-Fairy harder, although Yveltal no longer resists Ghost-type attacks from Marshadow and Lunala. Tera Fire boosts lets Heat Wave to OHKO Zacian-C (RC) while letting Yveltal more safely deal with defensive Ho-Oh and the aforementioned Arceus-Fairy (RC). (AP) This arguably making it makes Tera Fire the best Terastallization option for Sticky Web teams, (AC) since Yveltal is strong enough without Tera Dark, although it does not let Yveltal quickly muscle through Arceus-Fairy like Tera Flying does. Tera Fire must only be used on Sticky Web teams, (AC) however, since that's the only situation where Heat Wave is useful, and beating Ho-Oh and Arceus-Fairy is only more effective when its Yveltal is encouraged to use Taunt while outspeeding both (RC) to maintain Sticky Web and to win the one-on-one.
* It is ideal to avoid status conditions as much as possible, especially since Yveltal has poor longevity. Most status conditions can hinder Yveltal significantly (RP) this is redundant Toxic from Eternatus and defensive Arceus-Dark reduces Yveltal's longevity drastically, while Oblivion Wing struggles to make up for it. Paralysis from Zygarde and Giratina-O means Yveltal cannot outspeed bulky targets anymore, notably Primal Groudon, Ho-Oh, (AC) and Zygarde. Burns from Ho-Oh and Giratina-O drastically weakens weaken Sucker Punch, notably preventing the former from OHKOing Mega Mewtwo Y and Ultra Necrozma, even with Tera Dark for just the latter, I don't understand this. Are you saying that burned yveltal still ohkos Mega mewtwo y but not necrozma with tera dark? although this weakness is heavily mitigated for Tera Fire variants.
* Yveltal works best in the early-to-mid game, where it is able to break through physically defensive walls such as Primal Groudon and Zygarde for its teammates. While it appreciates pivot support from Pokemon such as Alomomola and Landorus-T, Yveltal can be used aggressively against moves it is immune to, such as Primal Groudon's Precipice Blades (RC) or Lunala's Psyshock; this is extremely risky, (AC) however, and it is not ideal to do this frequently since Yveltal is easy to kill via KO with Overheat from Primal Groudon (RC) or Moonblast from Lunala, with both OHKOing after one round of Life Orb damage.
* On Sticky Web teams, wallbreaking is Yveltal's main purpose for its team, and so it should be used in the early game early-game to break through physically defensive walls such as Primal Groudon and Zygarde (RC) all while maintaing maintaining Sticky Web and other hazards against Defog users such as Giratina-O and Ho-Oh with Taunt.
* Outside of hyper offense teams, Yveltal should be preserved due to its poor longevity, and it appreciates pivot support from Landorus-T. While it can come in aggressively against moves it is immune to, such as Primal Groudon's Precipice Blades or Lunala's Psyshock, this is heavily risky, since Yveltal is easy to punish (RC); (ASC) since other moves may be able to OHKO Yveltal, such as Primal Groudon's Overheat or Lunala's Moonblast both OHKOing after one round of Life Orb damage.
* Against teams with Ultra Necrozma, Deoxys-A, (AC) and Mega Mewtwo Y, it is necessary to preserve Sucker Punch Yveltal in order to revenge-kill revenge kill these threats (RC) and prevent them from getting out of hand. If Yveltal is running Knock Off instead, not only is it important to run another form of priority, such as Marshadow's Shadow Sneak, but Yveltal may want to play more aggressively with double-switches to stop these threats from setting up safely, as well as to wallbreak harder against defensive cores including Ho-Oh, Eternatus, (AC) and Zygarde.
* Yveltal is walled by against Calm Mind Arceus-Dark, Arceus-Fairy, to clarify: arceus fairy is NOT cm? if it is, ping me because we need to change defensive Eternatus, (AC) and Fezandipiti. On hyper offense and bulky offense teams, Behemoth Blade Zacian-C handles all four of these (RC) as well as checking and checks Extreme Killer Arceus, who'd which would otherwise easily revenge-kill revenge kill Yveltal after Life Orb chip (RC). (AP) while Zacian-C appreciates Yveltal breaking through Primal Groudon and Dondozo for it in return. Sticky Web support from Smeargle or Shuckle helps Yveltal prevent Calm Mind Arceus-Dark from setting up on it, letting Yveltal beat it one-on-one (RC) and even Arceus-Fairy with Tera Flying or Fire (RSC) one-on-one. (AP) Smeargle also removes Stealth Rock with Mortal Spin, assisting in Yveltal's longevity. Meteor Beam Eternatus is able to break past Arceus-Fairy and opposing Eternatus (RC) while sniping and snipe Ho-Oh with Meteor Beam (RC) while appreciating Yveltal breaking through Necrozma-DM. Finally, Chi-Yu can help overwhelm common checks with Yveltal, such as Arceus-Fairy and Eternatus (RC); (ASC) while it too has Taunt to maintain Sticky Web.
* On bulky offense and balance teams, Primal Groudon is a great partner, since while it appreciates Yveltal breaking past Zygarde and Giratina-O for it, Primal Groudon can check Arceus-Fairy, Zacian-C, and defensive Primal Kyogre (RC) while supporting Yveltal with entry hazards. Offensive Ho-Oh is a similar case, checking Arceus-Fairy and Arceus-Dark, but it helps Yveltal's weakness to Stealth Rock with Defog support (RC) while potentially weakening foes such as Eternatus with Thunder Wave (RC) for Yveltal to punish later. Dragon Dance Necrozma-DM and Dragon Dance Zygarde appreciate Yveltal breaking common defensive walls such as Primal Groudon, Coil Zygarde, (AC) and Giratina-O for their late-game sweeps, while Coil Zygarde is useful for paralysis support and as a blanket check to physical threats such as Primal Groudon and offensive Ho-Oh that may want to trade with Yveltal.

[SET CREDITS]
Written by:
https://www.smogon.com/forums/members/sami.604820/
Quality checked by:
https://www.smogon.com/forums/members/anchor9.652323/
https://www.smogon.com/forums/members/bumboclaat.523420/
https://www.smogon.com/forums/members/bobsican.434487/
Set(s) by:
https://www.smogon.com/forums/members/bumboclaat.523420/
Grammar checked by:
https://www.smogon.com/forums/members/sunny004.197240/
 
Last edited:
implemented
sunny004

* Sucker Punch allows Yveltal to revenge-kill revenge kill Ultra Necrozma after a single layer of Spikes, Deoxys-A, (AC) and Mega Mewtwo Y, to clarify, spikes is only relevant to ultra necrozma?
It's only for Ultra Necrozma

Burns from Ho-Oh and Giratina-O drastically weakens weaken Sucker Punch, notably preventing the former from OHKOing Mega Mewtwo Y and Ultra Necrozma, even with Tera Dark for just the latter, I don't understand this. Are you saying that burned yveltal still ohkos Mega mewtwo y but not necrozma with tera dark?
This is actually an error (sorry); Tera Dark doesn't OHKO either when burned. It also shouldn't say "the former" because I originally mentioned weakened Knock Off as well.
 
Ok I don't see too much more to change personally, but again just given the scale and importance of this analysis I'm going to request another pair of GPer eyes on this. So please mark this as GP 1/2 after you implement the below change for the first bullet point. Thanks!

add remove comment
* Yveltal's amazing STAB combination, which is only resisted by Zacian-C and niche Pokemon like Mega Diancie, in conjunction with Life Orb makes it a potent wallbreaker and stallbreaker for balance, bulky offense, and hyper offense teams alike. This is to the point where it is deemed mandatory on Sticky Web teams due to its efficiency and role compression as a source of priority (RC) and strong damage-dealer, and damage dealer as well as its sheer versatility with its movepool and Terastallization options. Yveltal's Speed tier outside of Sticky Web is also fantastic, outspeeding the majority of the defensive metagame such as Primal Groudon, Zygarde, and Ho-Oh, only being outsped by Calm Mind Arceus formes and Eternatus. It also carries useful defensive traits against Pokemon such as Ultra Necrozma, Deoxys-A, and Marshadow, despite it being weak to Stealth Rock. This makes it more flexible compared to other wallbreakers like the aforementioned Deoxys-A and Rayquaza, which rely much more on pivot support and revenge-killing opportunities; this is all while simultaneously being good against opposing offense teams and not being prediction reliant.
 
[SET]
name: Specially Offensive
move 1: Dark Pulse
move 2: Oblivion Wing
move 3: Taunt
move 4: Sucker Punch / Knock Off / Heat Wave
item: Life Orb
ability: Dark Aura
nature: Naive / Timid
evs: 4 Atk / 252 SpA / 252 Spe or 32 HP / 8 Def / 236 SpA / 8 SpD / 224 Spe
tera type: Dark / Flying / Fire

[SET COMMENTS]

* Yveltal's amazing STAB combination, which is only resisted by Zacian-C and niche Pokemon like Mega Diancie, in conjunction with Life Orb makes it a potent wallbreaker and stallbreaker for balance, bulky offense, and hyper offense teams alike. This is to the point where it is deemed mandatory on Sticky Web teams due to its efficiency and role compression as a source of priority and strong damage dealer as well as its sheer versatility with its movepool and Terastallization options. Yveltal's Speed tier outside of Sticky Web is also fantastic, outspeeding the majority of the defensive metagame including Pokemon such as Primal Groudon, Zygarde, and Ho-Oh (RC) and only being outsped by Calm Mind Arceus formes and Eternatus. It also carries useful defensive traits against Pokemon such as Ultra Necrozma, Deoxys-A, and Marshadow, despite it being weak to Stealth Rock. This makes it more flexible compared to other wallbreakers like Rayquaza and the aforementioned Deoxys-A and Rayquaza, which rely much more on pivot support and revenge-killing revenge killing opportunities; this is all while simultaneously being good against opposing offense teams and not being prediction reliant.
* Oblivion Wing provides Yveltal with a source of longevity, making up for its Stealth Rock weakness and the Life Orb recoil it takes (RC) while being useful against foes such as Marshadow, Alomomola, Arceus-Fairy, and Arceus-Dark, with Oblivion Wing being needed to beat the latter if this refers to both fairy and dark this should be "latter two" under Sticky Web.
* Taunt is mandatory on Yveltal, (AC) since it allows it to make progress much more easily by punishing more passive Pokemon such as Coil Zygarde, Ferrothorn, and Alomomola. This lets it avoid status conditions such as paralysis or and Toxic poison while preventing any setup opportunities from Zygarde, Necrozma-DM, Arceus-Ground, and Zacian-C. It also ensures that entry hazards such as Sticky Web stay up against common Defog users such as defensive Ho-Oh and Giratina-O, especially with Tera Fire for the former to resist Sacred Fire.
* Sucker Punch allows Yveltal to revenge kill Ultra Necrozma after a single layer of Spikes, Deoxys-A, and Mega Mewtwo Y, making Yveltal good at handling opposing offense teams. Knock Off allows for better wallbreaking against balance and stall teams, notably removing Heavy-Duty Boots off of from Ho-Oh and opposing defensive Yveltal (RC) alongside removing Eviolite off of from Chansey, all of which Yveltal's teammates can take advantage of. Heat Wave should only be used with Tera Fire and on Sticky Web teams, but it allows Yveltal to snipe Zacian-C, removing one of Yveltal's sturdy checks, but and it is significantly less useful than the other two options.
* A Naive nature is preferred over Hasty on the standard first EV spread, since it allows Yveltal to withstand pressure from Marshadow more reliably. It also allows Yveltal to avoid an OHKO from Deoxys-A's Rock Slide even after Stealth Rock chip damage. The secondary EV spread allows Yveltal to avoid several OHKO rolls (RC) including: Choice Band Rayquaza's Dragon Ascent, Zacian-C's Wild Charge, and Choice Specs Lunala's Moonblast; uninvested Arceus-Fairy's Judgment and defensive Primal Groudon's Overheat after one round of Life Orb recoil; and defensive Primal Kyogre's Ice Beam after Stealth Rock chip damage and one round of? Life Orb recoil. This is all while still outspeeding base-95 Speed Pokemon such as Rayquaza and Kyurem-B (RC) at the cost of not outspeeding Lunala anymore. A Modest nature is not encouraged since outspeeding Rayquaza on Sticky Web teams, as well as maximum Speed Primal Groudon and Primal Kyogre, Kyurem-B, and Zekrom outside of Sticky Web, is heavily important to for Yveltal's effectiveness as a wallbreaker. might be worth adding somewhere that the second spread runs Timid instead of Naive since that's mentioned in the next point
* Tera Dark is the primary Tera type on Yveltal, bringing its damage to all new heights. It notably lets Yveltal OHKO Eruption if eruption is referring to a specific ev spread, consider clarifying the specifics instead (like minimum HP and Special Defense) Primal Groudon and Rayquaza and 2HKO defensive Primal Kyogre and Ho-Oh, all with Dark Pulse. It also lets Yveltal more reliably OHKO Ultra Necrozma with Sucker Punch, which is necessary for the second EV spread, which as it runs a Timid nature. Tera Dark also removes Yveltal's weakness to Stealth Rock, giving it more longevity despite struggling slightly more against Marshadow, since it no longer takes neutral damage from Low Kick.
* Tera Flying boosts the power of Oblivion Wing, letting Yveltal 2HKO defensive Yveltal (RC) Arceus-Fairy after Stealth Rock chip (RC) and having defensive Yveltal as well as have a small chance to 2HKO Calm Mind Arceus-Dark after Stealth Rock, (AC) thus allowing it to chip too, letting Yveltal muscle through these Arceus formes under Sticky Web. Removing the Dark-type from Yveltal is especially useful to punish Arceus-Fairy harder, although Yveltal no longer resists Ghost-type attacks from Marshadow and Lunala. Tera Fire lets Heat Wave OHKO Zacian-C while letting Yveltal more safely deal with defensive Ho-Oh and the aforementioned Arceus-Fairy. This arguably makes Tera Fire the best Terastallization option for Sticky Web teams, since Yveltal is strong enough without Tera Dark, although it does not let Yveltal quickly muscle through Arceus-Fairy like Tera Flying does. Tera Fire must only be used on Sticky Web teams, however, since that's the only situation where Heat Wave is useful, and beating Ho-Oh and Arceus-Fairy is only more effective worth exhausting Terastallization for when Yveltal is encouraged to use Taunt while outspeeding both to maintain Sticky Web against the former and it is able to outspeed and use Taunt against the latter to win the one-on-one consulted with author.
* It is ideal to avoid status conditions as much as possible, especially since Yveltal has poor longevity. Toxic from Eternatus and defensive Arceus-Dark reduces Yveltal's longevity drastically, while Oblivion Wing struggles to make up for it. Paralysis from Zygarde and Giratina-O means Yveltal cannot outspeed bulky targets anymore, notably Primal Groudon, Ho-Oh, and Zygarde. Burns from Ho-Oh and Giratina-O drastically weaken Sucker Punch, notably preventing it from OHKOing Mega Mewtwo Y and Ultra Necrozma, even with Tera Dark, although this weakness is heavily mitigated for Tera Fire variants.
* Yveltal works best early-to-mid game, where it is able to break through physically defensive walls such as Primal Groudon and Zygarde for its teammates. While it appreciates pivot support from Pokemon such as Alomomola and Landorus-T, Yveltal can be used aggressively against moves it is immune to, such as Primal Groudon's Precipice Blades or and Lunala's Psyshock; this is extremely risky, however, and it is not ideal to do this frequently since Yveltal is easy to KO with Overheat from Primal Groudon or Moonblast from Lunala, with both OHKOing after one round of Life Orb damage.
* On Sticky Web teams, wallbreaking is Yveltal's main purpose, and so it should be used early-game to break through physically defensive walls such as Primal Groudon and Zygarde while maintaining Sticky Web and other hazards against Defog users such as Giratina-O and Ho-Oh with Taunt.
* Outside of hyper offense teams, Yveltal should be preserved due to its poor longevity (RC) and it appreciates pivot support from Landorus-T. While it can come in aggressively against moves it is immune to, such as Primal Groudon's Precipice Blades or Lunala's Psyshock, this is heavily risky, since Yveltal is easy to punish; other moves may be able to OHKO Yveltal, such as Primal Groudon's Overheat or Lunala's Moonblast both OHKOing after one round of Life Orb damage (RP) all of this is mentioned above - consider removing one of the two. Also since that would make this point only have 1 line, probably consider moving it under a different point
* Against teams with Ultra Necrozma, Deoxys-A, and Mega Mewtwo Y, it is necessary to preserve Sucker Punch Yveltal in order to revenge kill these threats and prevent them from getting out of hand. If Yveltal is running Knock Off instead, not only is it important to run another form of priority, such as Marshadow's Shadow Sneak, but Yveltal may want to play more aggressively with double-switches double switches to stop these threats from setting up safely (RC) as well as to wallbreak harder against defensive cores including Ho-Oh, Eternatus, and Zygarde.
* Yveltal is walled by Calm Mind Arceus-Dark, Arceus-Fairy, defensive Eternatus, and Fezandipiti. On hyper offense and bulky offense teams, Behemoth Blade Zacian-C handles all four of these and checks Extreme Killer Arceus, which would otherwise easily revenge kill Yveltal after Life Orb chip damage. Zacian-C appreciates Yveltal breaking through Primal Groudon and Dondozo for it in return. Sticky Web support from Smeargle or Shuckle helps Yveltal prevent Calm Mind Arceus-Dark from setting up on it, letting Yveltal beat it and even Arceus-Fairy with Tera Flying or Fire one-on-one. Smeargle also removes Stealth Rock with Mortal Spin, assisting in Yveltal's longevity. Meteor Beam Eternatus is able to break past Arceus-Fairy and opposing Eternatus and snipe Ho-Oh with Meteor Beam while appreciating Yveltal breaking through Necrozma-DM. Finally, Chi-Yu can help overwhelm common checks with Yveltal, such as Arceus-Fairy and Eternatus; it too has Taunt to maintain Sticky Web.
* On bulky offense and balance teams, Primal Groudon is a great partner, since while it appreciates Yveltal breaking past Zygarde and Giratina-O for it (RC) and Primal Groudon can check Arceus-Fairy, Zacian-C, and defensive Primal Kyogre while supporting Yveltal with entry hazards. Offensive Ho-Oh is a similar case, checking Arceus-Fairy and Arceus-Dark, but and it helps deal with Yveltal's weakness to Stealth Rock with Defog support while potentially weakening foes such as Eternatus with Thunder Wave for Yveltal to punish later. Dragon Dance Necrozma-DM and Dragon Dance Zygarde appreciate Yveltal breaking through common defensive walls such as Primal Groudon, Coil Zygarde, and Giratina-O for their late-game sweeps, while Coil Zygarde is useful for paralysis support and as a blanket check to physical threats such as Primal Groudon and offensive Ho-Oh that may want to trade with Yveltal.

[SET CREDITS]
Written by:
https://www.smogon.com/forums/members/sami.604820/
Quality checked by:
https://www.smogon.com/forums/members/anchor9.652323/
https://www.smogon.com/forums/members/bumboclaat.523420/
https://www.smogon.com/forums/members/bobsican.434487/
Set(s) by:
https://www.smogon.com/forums/members/bumboclaat.523420/
Grammar checked by:
https://www.smogon.com/forums/members/sunny004.197240/

GP Team done
 
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