In-battle formes
Base
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Speed: | 100 |
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Mega-X
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Sp. Def: | 85 | |||||||||||||||||||||||||||||||
Speed: | 100 |
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Evolutions
- Charmander
- Charmeleon
- Charizard
Strategies
- en
Overview
Mega Evolutions define Battle Spot Singles's metagame, but Charizard kicks that concept up a notch, being the only Pokemon with two Mega Evolutions! Mega Charizard X is the physical attacker, having an incredible boosting ability in Tough Claws. Its secondary Dragon typing makes it very unique among Fire-types, allowing it to set up on defensive Water-types with Dragon Dance and Swords Dance. With access to awesome support moves such as Flame Charge, Roost, and Will-O-Wisp and the bulk to use them, Mega Charizard X stands out as the most versatile physical Fire-type out there and as a physical Dragon-type that isn't checked by normal means such as Will-O-Wisp or Suicune.
Mega Charizard Y is the opposite side of the coin. With Drought and an impressive Special Attack stat, Mega Charizard Y is a ferocious wallbreaker that 2HKOes the majority of the metagame with no setup whatsoever. Drought even provides Mega Charizard Y with defensive benefits, allowing it to take on most Water-type Pokemon in conjunction with its good Special Defense stat and access to Solar Beam. Mega Charizard Y might not be as versatile as Mega Charizard X, but it doesn't need to be when the switch-ins most teams can provide will get 2HKOed at worst!
While each Charizard Mega Evolution is a dangerous Pokemon, both are reasonable enough to check on their own. However, since both of these Pokemon come under the disguise of Charizard at first, their threat level is magnified. Each Charizard has a dramatically different set of checks from each other, with one Pokemon checking one Charizard Mega Evolution, only to get obliterated by the other. With the limited number of Pokemon you can send out and the fast-paced nature of Battle Spot Singles in mind, this means that predicting the wrong Mega Evolution often results in losing a Pokemon or getting set up on, which is usually a devastating blow that often costs you the game!
The key to solving the nightmarish guessing game is to keep their similarities in mind, which opens up a few reliable tactics against both Mega Evolutions. Both also have a huge problem with Stealth Rock, which is likely to appear on any team that has big problems with the Mega Charizard duo, chopping off enough health to make it reasonable to revenge kill. Charizard's Speed, while certainly not bad, is hotly contested in Battle Spot Singles, meaning it Speed ties with Salamence and Mega Kangaskhan and gets outsped by the ever-so-common Garchomp. Finally, with Choice Scarf users, Garchomp, and common Focus Sash users such as Breloom often running Rock-type attacks, landing a super effective hit on either Mega Evolution is actually a feasible task. In general, applying constant offensive pressure on the Mega Charizard family can save teams from getting tricked by this two-in-one Pokemon.
Dragon Dance
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With a Dragon Dance in tow, Mega Charizard X becomes a powerful sweeper that outspeeds every relevant non-Choice Scarf Pokemon in Battle Spot Singles. Outrage is Mega Charizard X's cleaning tool of choice, OHKOing most offensive Pokemon after a boost. Flare Blitz is just as powerful as Outrage but doesn't lock Mega Charizard X in, making it a good move to throw out before setting up despite the recoil.
The last move is a bit trickier to choose and depends on the makeup of your team. Earthquake allows Mega Charizard X to OHKO Heatran and pick off weakened Aegislash without risking a King's Shield hit. Roost allows Mega Charizard X to recover from Stealth Rock damage against nonthreatening Pokemon such as Ferrothorn, and it allows Mega Charizard X to set up multiple Dragon Dances against certain defensive threats such as Suicune that lack Roar. Dragon Claw is a weaker but safer Dragon-type STAB move than Outrage, perfect for smashing through Dragon-types without risking a Steel- or Fairy-type switching in. Finally, Thunder Punch allows Mega Charizard X to OHKO Azumarill after a boost, to 2HKO Suicune without locking itself into Outrage, and to get past bulky Gyarados more easily.
Set Details
Mega Charizard X will want to maximize its Attack and Speed EVs to ensure it can sweep as easily as possible. The rest goes into Defense rather than HP, as this means less damage is taken from Stealth Rock. Make sure to carry Charizardite X so you don't use the wrong Mega Evolution!
Adamant is usually the best nature for Mega Charizard X, giving it plenty of power while still outspeeding non-Choice Scarf Pokemon after a Dragon Dance. However, a Jolly nature is still valuable for allowing Mega Charizard X to outspeed Kangaskhan and Lucario before they Mega Evolve and to outspeed the rare Jolly Choice Scarf Landorus-T. Note that the loss of power will be noticeable, losing out some KOs such as no longer guaranteeing a 2HKO on maximum HP Leftovers Heatran with a boosted Outrage.
Usage Tips
The key to sweeping with Mega Charizard X is knowing when to use Dragon Dance. Early in the game, if your opponent could potentially send out big problems such as Choice Scarf Garchomp, Hippowdon, bulky Landorus-T, Thundurus (which can use Prankster Thunder Wave to ruin a sweep), and walls that can paralyze Mega Charizard X such as Porygon2 and Cresselia, you're better off attacking instead of setting up. Only set up Dragon Dance later in the game, when these checks have been weakened enough. Note that if running Lunar Dance Cresselia, you can use Mega Charizard X early in the game to deal plenty of damage, or use it more recklessly against Pokemon with status moves, since Lunar Dance will restore it back to perfect health!
Since Mega Charizard X often finds itself using the recoil-causing Flare Blitz, it's also best to set up on Pokemon that won't harm Mega Charizard X too much. Defensive Rotom formes, Volcarona, Ferrothorn, Raikou, and Mega Charizard Y are good examples of Pokemon Mega Charizard X will usually scare out. Note that defensive Rotom formes and Ferrothorn occasionally carry Thunder Wave, which can be an issue if they predict setup. If Charizard has Roost, you can even set up on Suicune that lack Roar! Mega Charizard X's setup potential is especially boosted if given support in the form of Yawn.
While it might be tempting to always use Mega Charizard X as a sweeper, sometimes it's best to just attack switch-ins right away, especially if the opponent's Mega Charizard X answers tend to be more offensive Pokemon. Mega Charizard X's STAB moves have plenty of power before a boost, enough so that against a slower, weakened team, Dragon Dance might not even be needed.
If Stealth Rock isn't set up, you have the option of keeping Charizard unevolved for some time. This is great for double switches and scouting what your opponent's response to Charizard will be, potentially throwing them off guard if they choose the wrong check for Mega Charizard X. Also, Charizard has a useful Ground immunity, which can help it set up against Choice-locked Ground-type attacks or some offensive Heatran variants before Mega Evolving.
Team Options
Garchomp is Mega Charizard X's biggest problem, naturally outspeeding it and even being able to run a Choice Scarf or a Focus Sash to defeat it after a Dragon Dance. Bulky Ground-types such as Hippowdon and defensive Landorus-T and Focus Sash or Choice Scarf Mamoswine and Excadrill are also serious problems. Azumarill defeats Mega Charizard X without Thunder Punch, while faster Dragon-types such as Latios, Mega Salamence, and Hydreigon will OHKO Mega Charizard X before it can set up Dragon Dance. Finally, Thundurus and Cresselia, while not being able to directly defeat Mega Charizard X, can stop its sweep with Thunder Wave.
Because of these issues, Rotom-W makes a great teammate. It handles bulky Ground-types and Mamoswine fairly well with Hydro Pump, can burn Garchomp, handles Belly Drum Azumarill, and can even cripple Cresselia with Trick if running an offensive set! In return, Mega Charizard X sets up on Ferrothorn for Rotom-W. A Hippowdon of your own also makes an excellent teammate, being able to use Stealth Rock to help Mega Charizard X grab more KOs; it also has access to Yawn to help Mega Charizard X set up and is able to deal with Garchomp and Mega Kangaskhan. Defensive Zapdos does a good job against Azumarill and Mega Salamence, while Suicune can defeat Mega Salamence, Ground-types, and set up Calm Mind on Cresselia.
On the more offensive side of things, Serperior checks Azumarill and Ground-types, while Mamoswine aids Mega Charizard X by defeating Focus Sash Garchomp, Landorus-T, and Thundurus with Icicle Spear, as well as setting up Stealth Rock. Azumarill does a great job of taking on specially attacking Dragons, is immune to Outrage, smashes Hippowdon, and can revenge kill weakened Excadrill, Mamoswine, and Landorus-T. While Greninja offers no defensive synergy with Mega Charizard X, its ability Protean and its movepool allow it to revenge kill most of Mega Charizard X's threats, and it does a great job softening up threats to make way for a Mega Charizard X sweep.
Cresselia deserves special mention as a teammate, as Lunar Dance makes Mega Charizard X far more versatile in the earlier parts of the game thanks to the full recovery. Cresselia also deals with Garchomp and Landorus-T, and it supports Mega Charizard X by paralyzing faster foes with Thunder Wave.
Versatile Sweeper
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Swords Dance boosts Mega Charizard X's Attack to frightening new levels, allowing it to become a powerful wallbreaker. Flame Charge boosts Mega Charizard X's Speed. While it has low Base Power, Tough Claws and STAB boost it enough to make it a good tool for maintaining pressure against offensive teams and defeating faster Focus Sash switch-ins. Outrage is Mega Charizard X's main STAB move, being so powerful that even Heatran is 2HKOed after a Swords Dance! Flare Blitz complements Outrage perfectly, allowing Mega Charizard X to slam walls without locking itself into Outrage and to hit Fairy-types hard. In fact, after a Swords Dance, Flare Blitz has a 75% chance to OHKO Azumarill after Stealth Rock damage! However, if you're more worried about hitting Heatran before a boost, Earthquake is an acceptable alternative.
Set Details
Maximum Attack and Speed investment is needed for Mega Charizard X to be a competent wallbreaker. 4 Defense EVs are better than HP EVs, as this means Charizard will take less damage from Stealth Rock. Make sure to carry Charizardite X to Mega Evolve into Mega Charizard X.
An Adamant nature fits this set the best, as it maximizes Mega Charizard X's wallbreaking power. However, a Jolly nature allows Mega Charizard X to Speed tie with Salamence and outspeed Kangaskhan and Lucario before they Mega Evolve. This comes at the cost of power, however, losing the chance to OHKO Azumarill and Cresselia after a Swords Dance and Stealth Rock.
Usage Tips
Don't be reckless when switching Mega Charizard X in, as its reliance on boosted Outrage and Flare Blitz tends to make it the shortest-lived Mega Charizard X set. Usually, you'll want to switch Mega Charizard X in on something it can set up on without taking damage, after a KO, or via a slow U-turn or Volt Switch. Good Pokemon to set up on include defensive Rotom formes, Volcarona, Raikou, Ferrothorn, Scizor, and Mega Charizard Y. Also, note that if you are using Mega Charizard X with Cresselia, being more reckless against opponents becomes a much more viable tactic thanks to Lunar Dance.
While Mega Charizard X is nearly unstoppable once it sets up both Swords Dance and Flame Charge, setting up both is a difficult task, so oftentimes it's best to choose which move to set up with. When more defensive Pokemon are left, Swords Dance is the best move to set up with to break through walls, paving the way for other sweepers to clean up. If more frail, offensive Pokemon are left, then it's best to use Flame Charge to either set up a clean sweep or take out an important, fast Pokemon. Just note that this can be unsafe if Choice Scarf or Focus Sash Garchomp is around, so make sure to scout its item. Generally, Mega Charizard X is faster than the targets it wants to defeat with Swords Dance-boosted attacks, while the faster threats are OHKOed without a boost and only need to be outsped via Flame Charge.
A common way to defeat Mega Charizard X is to goad it into using Outrage so that Fairy-types like Azumarill and Mega Mawile can hit it hard, so only use Outrage if you absolutely need a threat down if you see Fairy-types in Team Preview. Steel-types are used for a similar purpose, but note that after a Swords Dance, most such as Heatran will be 2HKOed by Outrage.
Team Options
Stealth Rock support is highly recommended for this Mega Charizard X, as it gives it the chance to get some major KOs against defensive threats after a Swords Dance, such as a guaranteed OHKO on Suicune, a 62.5% chance to OHKO Cresselia, and a 75% chance to OHKO Azumarill. Hippowdon is an excellent choice, as it deals with Garchomp, one of Mega Charizard X's archnemeses; can use Yawn to help Mega Charizard X set up; and has Sand Stream to take care of Focus Sash. In a similar matter, Swampert can use Yawn and set up Stealth Rock, and as a bonus, its Water typing allows it to hit Mamoswine, Excadrill, and Landorus-T hard. Mamoswine is also a good user of Stealth Rock, and it is able to defeat Thundurus and Focus Sash Garchomp. A Focus Sash Garchomp of your own does a good job of setting up Stealth Rock, while Landorus-T can set up Stealth Rock and soften up foes with Intimidate. All of these Pokemon appreciate Mega Charizard X's wallbreaking power and can also help against Heatran if Mega Charizard X lacks Earthquake.
One of this Mega Charizard X's biggest problems is faster Dragon-types. Garchomp is the biggest issue, since it naturally outspeeds Mega Charizard X, and it can even run a Choice Scarf to always outspeed. Mega Salamence and Choice Scarf Hydreigon always outspeed it before a boost. Azumarill is also a big problem if Stealth Rock isn't set up. Defensive Zapdos is a good choice for a partner, as it can help with Mega Salamence and Azumarill. While not as bulky as Zapdos, Thundurus can use Prankster Thunder Wave to deal with faster Dragons. Cresselia does a great job against Garchomp and Mega Salamence, and it can support Mega Charizard X with Thunder Wave and Lunar Dance. Suicune also does well against Garchomp and Mega Salamence and can aid further against Battle Spot Singles's walls with Calm Mind. If you're especially worried about Azumarill, Serperior can work well against it; it also forms a good defensive core with Mega Charizard X and Suicune and can paralyze faster threats with Glare. While frail, Breloom can be a great teammate, dealing with Azumarill, slowing down foes with Rock Tomb, and even putting foes to sleep with Spore so Mega Charizard X can set up. Greninja can soften up or outright KO many of Mega Charizard X's threats despite its frailness. Finally, Mega Kangaskhan makes a good backup Mega Pokemon, as it deals with offensive teams better, while Mega Charizard X can handle more defensive teams.
As a special mention, seriously consider Cresselia as a teammate, as Lunar Dance gives Mega Charizard X a second chance to sweep. Cresselia also defeats Garchomp, Mega Salamence, and Landorus-T and can provide Mega Charizard X with Thunder Wave support so it can use Swords Dance more often.
Drought Attacker
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With the sun shining, Flamethrower is an extremely powerful attack, 2HKOing most Pokemon that don't resist it. Fire Blast is even more absurdly powerful, 2HKOing Pokemon that resist it such as Mega Salamence, Garchomp, Hydreigon, and opposing Mega Charizard Y. However, because of Mega Charizard Y's physical frailness, missing with Fire Blast can be deadly. Solar Beam complements the Fire STAB type perfectly, smashing Water-types such as Azumarill, Rotom-W, Suicune, and Swampert. It's also useful for revenge killing weakened Tyranitar in the sun. Focus Blast's accuracy can be a bit shaky, but it allows Mega Charizard Y to 2HKO Heatran and seriously damage Tyranitar switch-ins.
Overheat is an extremely powerful attack, dealing over 50% to most possible switch-ins. However, it greatly reduces Mega Charizard Y's power, often forcing it to switch, which is especially costly when your opponent has set up Stealth Rock. Hidden Power Ice OHKOes incoming Garchomp and Mega Salamence, potentially opening up a sweep for Mega Charizard Y, but note that Fire Blast does more to Pokemon that are only 2x weak to Hidden Power Ice. Roost allows Mega Charizard Y to recover from Stealth Rock damage and stay alive longer. Mega Charizard Y's good Special Defense stat means it is capable of using Roost against walls such as Porygon2, Cresselia, and Suicune and against Pokemon it scares out such as Aegislash, Ferrothorn, and Scizor. Flame Charge might seem a bit strange because it's a physical attack, but its Speed-boosting effect is great for allowing Mega Charizard Y to defeat faster threats such as Greninja and Choice Scarf Landorus-T, letting Mega Charizard Y defeat faster Focus Sash Pokemon after hitting them on the switch, and even potentially sweep weakened teams.
Set Details
Maximum HP and Speed are needed for full wallbreaking power. The leftover EVs should go in Defense so that Mega Charizard Y can switch into Stealth Rock twice. If you are using Hidden Power Ice, put the remaining EVs in Special Defense instead so you don't waste any EVs. Blaze is the simplest nature to use, since it has no harmful effects, and Trace Pokemon can't make any use of it. However, Solar Power has the bonus of making Charizard more powerful than Mega Charizard Y under the sun, which can be useful if your opponent is also running Mega Charizard Y. Make sure to hold a Charizardite Y so Charizard will Mega Evolve into Mega Charizard Y.
A Timid nature makes the most sense for Mega Charizard Y, since it already has plenty of power under the sun, and it can then Speed tie with Salamence and outspeed Lucario and Kangaskhan before they Mega Evolve. However, if you want more power, Modest allows Mega Charizard Y to 2HKO Garchomp, Mega Salamence, and Hydreigon with Flamethrower.
Usage Tips
Stealth Rock is a huge problem for Mega Charizard Y, chopping off almost half its health per switch in. Try to prevent Stealth Rock from being set up any way you can. If your opponent's Stealth Rock user looks like a more defensive, bulky user such as Hippowdon or Swampert, consider leading with Mega Charizard Y to avoid one switch into Stealth Rock and for the ability to slam them with Solar Beam. However, Mega Charizard Y won't be able to stop fast users of it such as Garchomp. If the opponent's team looks like it will put too much pressure on Mega Charizard Y due to Stealth Rock and a high number of offensive Pokemon, consider benching Charizard.
Usually, you'll want to Mega Evolve Charizard as soon as possible, as there are almost no direct benefits otherwise. The only reasons to not Mega Evolve are to grab a KO so you don't waste a turn of Drought, to predict a Tyranitar or Politoed switch-in, or if you want to double switch and keep your Charizard's Mega Evolution unrevealed.
Mega Charizard Y works great early- or mid-game, where it can deal massive damage to incoming Pokemon, softening them up for a sweep from its teammates late on. However, Mega Charizard Y is so powerful that cleaning up isn't out of the question late-game, especially if it is carrying Flame Charge. Also, try to target slower Pokemon with Mega Charizard Y, as fast offensive threats such as Garchomp and Mega Salamence deal massive damage to it.
Team Options
Stealth Rock is Mega Charizard Y's biggest fear, so if you can't stop it, at least check the threats that set it up. Additionally, Pokemon that carry Rock-type moves such as Garchomp, Landorus-T, and Excadrill often carry Focus Sash or Choice Scarf to revenge kill Mega Charizard Y. Talonflame is problematic because it resists all of Mega Charizard Y's attacks and can OHKO it with Choice Band-boosted Brave Bird. Rotom-H is also a problem due to its resistance to Fire- and Grass-type moves and its super effective Electric STAB type. While Thundurus and Raikou are hit hard by the Fire-type attacks, they can also outspeed and zap Mega Charizard Y. Finally, Politoed can flip the weather on Mega Charizard Y with its Drizzle ability.
Hippowdon makes an excellent teammate for Mega Charizard Y. It can hit Garchomp and offensive Landorus-T hard with Ice Fang, deal with Excadrill, and use Yawn to put Politoed switch-ins to sleep. They also have good typing synergy, with Hippowdon taking Rock-type attacks and Mega Charizard Y dealing with Grass-type attacks and certain special attacks. A unique aspect of Hippowdon is that it has Sand Stream, which allows Mega Charizard Y to reset the sun at any time. Tyranitar is also great for resetting the weather, and it does a good job of handling Talonflame, Latias, Latios, and Thundurus that lack Focus Blast. Mamoswine is a great option to consider, taking care of Focus Sash Garchomp, Landorus-T, and Thundurus, and if you are especially desperate to keep Stealth Rock off the field, it can even use a Choice Scarf to defeat Garchomp before Garchomp can move. Serperior cuts through Mamoswine and Politoed with Leaf Storm, can Taunt most Stealth Rock users before they move, and can Glare through Ground-types such as Garchomp. Ferrothorn handles Politoed and has a Rock-type resistance, the ability to handle Raikou and Thundurus, and the utility of Thunder Wave to support Mega Charizard Y. Conkeldurr takes Rock-type attacks fairly well and can hit Choice Scarf Excadrill and Mamoswine with Drain Punch. Bulky Landorus-T takes on most Ground-types fairly well, defeats offensive Talonflame, and can use U-turn to get Mega Charizard Y in, while Thundurus-T absorbs Electric-type attacks and fries Politoed and Talonflame with Thunderbolt. Thundurus can use its Prankster Thunder Wave to aid Mega Charizard Y against faster threats, and it can use a bulky EV spread to handle Talonflame and Mega Salamence.
Defensive
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Will-O-Wisp is what makes this set so effective, crippling many of Mega Charizard X's physical switch-ins. Roost is the other key to this set, allowing Mega Charizard X to stick around for a long time. Dragon Claw doesn't have high Base Power, but STAB and Tough Claws makes it a reliable attack. Flame Charge is a bit weak, but the Speed boost it provides is invaluable for allowing Mega Charizard X to burn or attack faster threats such as Garchomp and Mega Kangaskhan. If you're more worried about Heatran, Earthquake is an acceptable secondary attack.
Set Details
Running a Jolly nature and 220 Speed EVs gives Mega Charizard X the ability to outspeed Adamant Salamence and Mega Kangaskhan. The HP EVs give Charizard an odd HP number to take less damage against Stealth Rock, and 116 Defense EVs maximize its physical bulk. If you prefer to be a bit quicker, you can run maximum Speed EVs to at least Speed tie with Salamence and Mega Kangaskhan, but note that these two often opt for Adamant over Jolly anyway. If you're interested in a bulkier spread, 172 HP / 132 Def / 204 Spe with an Impish nature gives Mega Charizard X better bulk, at the cost of only being able to outspeed base 80 Speed Pokemon.
Usage Tips
Usually, it's best to Mega Evolve Charizard as soon as you can to get a better defensive typing and stats. Staying in as Charizard only helps with switching into Ground-type attacks and keeping the opponent in the dark as to what Mega Stone you're running if you double switch. Mega Evolving early also lessens Stealth Rock's damage, to the point where leading with Charizard is encouraged as long as you think you can get a favorable lead matchup. Staying in against faster Dragons such as Garchomp is ill advised.
Throw out Will-O-Wisp as much as possible. Many of Mega Charizard X's checks are physical Ground-types in addition to Azumarill, making this Mega Charizard X set a great lure. You'll want to use a combination of Dragon Claw and Roost to whittle down these foes' health. Will-O-Wisp is even useful against bulky special attackers such as Porygon2 and Cresselia, as Will-O-Wisp can wear them down into the KO range of powerful sweepers. If you're carrying Flame Charge, using this attack early is useful so Mega Charizard X can burn faster threats such as Choice Scarf Landorus-T. Garchomp and Mega Salamence are also hit hard by Dragon Claw after a Speed boost, but note that they won't be OHKOed without previous damage. You can burn them, but note that they can still do heavy damage, with Salamence in particular being able to use Draco Meteor, while some Garchomp run Lum Berry.
Team Options
Mega Charizard X is a great lure against physical attackers such as Azumarill and Garchomp thanks to Will-O-Wisp, so packing in Pokemon to take advantage of burned foes is a good idea. Azumarill is a fantastic option, being able to easily set up Belly Drum on burned Pokemon. Calm Mind Sylveon does better when its foes are burned, and it happens to deal with defensive Pokemon well too. Weakness Policy Aegislash can take advantage of weaker super effective attacks to set up, while burned Pokemon have a difficult time preventing a Dragonite from setting up. Mega Charizard X can also be an invaluable lure for sand-based Excadrill teams for its ability to lure and cripple Landorus-T as well as deal with defensive Rotom-W and Ferrothorn. Just note that since this means you're also running either Hippowdon or Tyranitar, this core has severe problems with Suicune and offers no resistances to powerful Water-type attacks in general.
This Mega Charizard X set has trouble against bulky Pokemon that don't care about status, such as Suicune and Mega Sableye. Raikou sets up Calm Minds on Suicune with ease, and Serperior also works well with Leaf Storm. Both of these Pokemon also love Mega Charizard X's ability to deal with Ferrothorn and burn physical attackers. Zapdos is a good teammate against Suicune as well, while Sylveon and Azumarill can hit Mega Sableye hard. Thundurus and Thundurus-T can surprise Mega Sableye with Nasty Plot and also jolt through Suicune.
Other Options
For Mega Charizard X, Belly Drum might seem like a devastating setup attack, but Mega Charizard X's lack of priority and common Speed tier make it far more risky than Dragon Dance and Swords Dance. Rock Slide can be used to OHKO Mega Charizard Y and Talonflame, but Dragon-type attacks do plenty already. Fire Punch is a Fire-type attack that lacks recoil, but Flame Charge is usually the better choice for the Speed boost.
For Mega Charizard Y, Sunny Day can be useful to surprise Politoed and Tyranitar switch-ins, but it does little else. Dragon Pulse hits Hydreigon and Latios harder, but Fire-type moves do plenty enough to them, and Focus Blast does more to Hydreigon. If you're especially worried about Talonflame and other Mega Charizard Y, you can use Ancient Power to OHKO them. Air Slash is useful for inducing flinches and does a bit more against Conkeldurr and Mega Venusaur, but otherwise it is too weak to do much despite having STAB. If you really want to surprise Tyranitar, Heatran, and Chansey, you can use Focus Punch on Mega Charizard Y, though note that this only works on the switch. In general, Mega Charizard Y is strapped for moveslots, so using more exotic options is a difficult proposal for most teams.
Tailwind is an interesting choice to consider on both Charizard Mega Evolutions, as it allow them to outspeed Garchomp. However, it doesn't last long, and it doesn't have the Attack boost of Dragon Dance or the offensive pressure of Flame Charge. Substitute protects both Mega Evolutions from status, allows them to take advantage of their ability to force switches, and saves them from Mega Mawile's Sucker Punch and Choice Scarf Garchomp, but otherwise it costs them in coverage. Regular Charizard is monstrously powerful with a Life Orb, Solar Power, and Sunny Day, but the setup and lack of bulk are huge problems.
Checks and Counters
For Both Charizard Mega Evolutions
Stealth Rock: Stealth Rock chopping off half the health before Charizard can Mega Evolve really shortens its. Common users of Stealth Rock include Hippowdon, Garchomp, Landorus-T, Excadrill, and Swampert.
Mega Altaria: Mega Altaria is uncommon, but it's one of the few Pokemon to wall both Mega Evolutions, and it can hit both of them hard with its Dragon- and Fairy-type STAB moves. It can even run Facade to punish Will-O-Wisp.
Garchomp: Garchomp naturally outspeeds Charizard and often carries a Rock-type attack to hit them hard no matter which Mega Evolution it chooses. Garchomp can even run a Choice Scarf to outspeed Mega Charizard after a Dragon Dance or Flame Charge, but Garchomp that lack Choice Scarf must be warry of Flame Charge.
Other Offensive Ground-types: Ground-types often carry STAB Earthquake to defeat Mega Charizard X and Rock-type moves to defeat Mega Charizard Y. Focus Sash users such as Excadrill and Landorus-T can pull this off, and they can also use Choice Scarf to outspeed Mega Charizard X and Y before a Dragon Dance or Flame Charge. Even though Mamoswine doesn't always run a Rock-type attack, it still often runs Focus Sash, OHKOes Mega Charizard X with Earthquake, and deals massive damage to Mega Charizard Y with Icicle Spear.
Mega Salamence: Mega Salamence takes a lot of damage from both Charizard Mega Evolutions, but its STAB Double-Edge does a ton of damage to both. Earthquake hits Mega Charizard X hard, and Draco Meteor OHKOes Mega Charizard X. Mega Salamence is also faster than both Charizard Mega Evolutions before a Speed boost.
Thundurus: Thundurus hits Mega Charizard Y hard with Thunderbolt and can use prankster Thunder Wave to ruin Mega Charizard X's chances of sweeping. However, it can't take either of their hits very well, with even bulky Thundurus being 2HKOed.
Mega Kangaskhan: While it only Speed ties with Mega Charizard X and Y, said Speed tie means that Mega Kangaskhan can smash them with Double-Edge or Earthquake. It even sometimes runs Rock Slide.
Breloom: Breloom might sound preposterous as a check, but its affinity for Focus Sash and high-powered Rock Tombs are a big problem for Mega Charizard X and Y if Stealth Rock isn't set up.
For Mega Charizard X
Bulky Ground-types: Bulky Ground-types such as Hippowdon and Landorus-T can usually survive unboosted assaults and smash Mega Charizard X with Earthquake. Rhyperior also works, since Solid Rock covers its Earthquake weakness. Note that none of these like Will-O-Wisp.
Azumarill: Azumarill resists Mega Charizard X's STAB types and can hit hard with Play Rough. However, +1 Thunder Punch and +2 Flare Blitz can defeat Azumarill, and it hates Will-O-Wisp.
Heatran: Mega Charizard X without Earthquake can have a hard time against Heatran without boosts while Heatran can slam it hard with Earth Power.
Faster Dragons: Latios, Latias, and Choice Scarf Hydreigon outspeed and can OHKO Mega Charizard X; however, they are unable to switch in and must watch out for Speed-boosting moves such as Dragon Dance and Flame Charge.
Cresselia: While Cresselia doesn't directly hurt Mega Charizard X much, it can cripple Mega Charizard X with Thunder Wave. It must watch out for Swords Dance-boosted Outrage, however.
For Mega Charizard Y
Talonflame: Talonflame resists all of Mega Charizard Y's attacks and can either wall it with a specially defensive set or outright OHKO it with Choice Band-boosted Brave Bird. Note that Talonflame can lose in the rare case of Ancient Power Mega Charizard Y.
Politoed: Unlike most Water-types, Politoed has Drizzle, which ruins Mega Charizard Y's ability to hit it with Solar Beam.
Rotom-H: Calm Rotom-H isn't 2HKOed by Mega Charizard Y, and it 2HKOes with Thunderbolt in return. Offensive variants take heavy damage from Fire-type attacks, but Choice Specs variants in particular can OHKO Mega Charizard Y.
Mega Charizard X: Mega Charizard X takes little damage from Fire- and Grass-type attacks, and it can use Mega Charizard Y as setup fodder.
Dragonite: Thanks to Multiscale and resistances, Dragonite sets up on Mega Charizard Y, unless it switches into Hidden Power Ice after Stealth Rock damage.
Specially Defensive Tyranitar: Although Focus Blast deals serious damage, specially defensive and Assault Vest Tyranitar get rid of the sun and easily OHKOs Mega Charizard Y. Choice Scarf Tyranitar also outspeeds Mega Charizard Y, and switching into a Solar Beam means Tyranitar will usually win. In general, Tyranitar's appearance makes Solar Beam much more difficult to use for Mega Charizard Y, reducing its versatility.
Faster Electric-types: While they can't take Mega Charizard Y's attacks very well, faster Electric-types such as Raikou and Thundurus-T can revenge kill it. Choice Scarf Rotom-W can also revenge kill weakened Mega Charizard Y, though it can get OHKOed by Solar Beam. Also, none of these threats can handle Mega Charizard Y once it gets a Flame Charge boost.
Chansey and Blissey: Chansey and Blissey's massive HP and Special Defense stats ensure that Mega Charizard Y can't muscle past them.
Entei: Assault Vest Entei can tank Mega Charizard Y's attacks and threaten to OHKO it with Stone Edge.
Chandelure: While uncommon, Flash Fire Chandelure completely walls Mega Charizard Y and can hit it with Shadow Ball while threatening other switch-ins with its own Fire Blasts.
Greninja: Greninja normally makes a poor Mega Charizard Y check, but if it's running Rock Slide or Rock Tomb, it can act as a surprise revenge killer as long as Mega Charizard Y hasn't used Flame Charge.