With all the commotion on Arena, I would like to contribute another concept I've playing around with lately. After a few days of thinking / optimizing / testing, this is the team I ended up with. In the final version, I ended up needing the third Pokemon only rarely, so I'm still not quite sure if it's the best. It has been consistently getting ~40 wins in succession, and I think there's room for improvement. Here we go!
"I have a song Inside" -- Bill & Gloria Gaither
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Gengar @ Lum Berry
Ability: Levitate
EVs: 252 HP / 36 Def / 220 Spe
Timid Nature (+Spe, -Atk)
- Perish Song
- Substitute
- Psychic
- Destiny Bond
Gengar is the lead of choice to set up the star of this team: an "Arena-cheesing" Lapras. It's fast and sets up Perish Song with ease. If Gengar can beat their first Pokemon on its own with Psychic, I'm pretty much guaranteed to win the battle (as should be the case with most Arena teams). Why Psychic, you might ask. It's to win the 1v1 against those STAB Cross Chop-carrying Pokemon, so Lapras can focus on Special Defense in order to live STAB Thunders and still be able to make a Substitute. But of course, it beats some other Pokemon as well.
If Gengar can't win the matchup, it usually uses Perish Song until it faints (so it's actually sure to LOSE the judging because it'll "fail"). Finally, Destiny Bond is to drag along their second Pokemon if I can win against the first and Lapras doesn't look good. It's most important use is against Soundproof Pokemon: Destiny Bond is the only move I can beat all of them with guaranteed.
Note that Gengar wins against Greta 100% of the time on its own: Umbreon will always keep using Confuse Ray for some reason, so Sub + Psychic + Psychic wins Mind and Skill even if it doesn't affect Umbreon LOL.
Thank you
Adedede for thinking along about this Gengar.
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Lapras @ Leftovers
Ability: Shell Armor
EVs: 252 HP / 4 Def / 252 SpD
Sassy Nature (+SpD, -Spe)
IVs: 6 Speed
- Substitute
- Protect
- Dive
- Perish Song
I love Shell Armor Lapras. This thing survives all non-Cross Chop/Focus Punch/Explosion hits guaranteed, outslows the opponent (but still has 6 Speed IVs to outspeed Rhydon) and makes a Substitute while they faint to Perish Song (possibly use Protect first, or Protect + Sub + Protect if their Perish Count is 3 at the beginning). Note Lapras is heavily in favor of being able to make a Substitute against even Ampharos/Raikou THUNDER. Stuff like Meteor Mash doesn't even come close of bringing me under 25%, and I don't have to be afraid of STAB (Choice Band) Normal moves since I have lead Gengar.
This makes the sequence [into Water] + Dive + Protect win on Skill and Body against most Pokemon, and it makes Lapras heal enough HP to live most hits against the next Pokemon as well. If possible, Lapras secures the game against their last Pokemon with Perish Song.
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Swampert @ Shell Bell
Ability: Torrent
EVs: 252 HP / 96 Def / 160 SpD
Calm Nature (+SpD, -Spe)
- Substitute
- Protect
- Dive
- Endeavor
After a lot of testing, this Swampert came up as a good last over Latios on this particular team. Basically it follows the same strategy as Lapras does, and it's also really hard to bring under 25% with one move, although it does give me some risk against Sceptile if Lapras got too low before. Luckily, Sceptile mostly appears on "starter Pokemon" trainers, which I handle perfectly otherwise. Usually, all Swampert it does is come in, Protect, and win the battle. Unlike Lapras, this Swampert doesn't have a -Spe nature or reduced IVs, since it has to be able to outspeed OHKO users in case they nail Lapras.
But if needed, it can make a Sub like Lapras, "Dive-cheese" the next opponent with Dive and Protect. Against Water Absorbers and the like, or against last Pokemon if really necessary, it can use "Shell Bell Endeavor" on the last turn, which ensures that I win Body at least.
Lastly, another strategy I can use if I'm REALLY behind is use Dive when they die to Perish. Interestingly, Swampert then stays underwater on the first turn of the next Pokemon, so they will likely miss on turn 1, after which I can Protect + Endeavor and win both Skill and Body. Of course, act accordingly if you can win Mind instead at the expense of Skill.
I'm pretty sure this team can be further optimized, but I was mainly impressed with its ability to seal games very early in the battle, sort of like Trick does in Battle Tower. I can't wait to hear your suggestions.