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Oops.
This shouldn't count as a bump, although if it does I'm sorry.
I'm thinking of doing this with a Mono-Poison team, shouldn't be too hard.
Golbat/Crobat for Fly, Tentacruel for Surf, various others for other HMs.
Budew comes on early in the game, and Skorupi follows not long after so it...
Pretty much a copy+paste from my post at Serebii, hopefully that isn't against the rules or anything >_>
Streak of 142 in the Battle Tower, using absolutely no cheats or TrickScarf methods.
Team:
Garchomp @ Life Orb
Nature: Jolly
Trait: Sand Veil
EVs: 252 Attack / 252 Speed / 4 HP
-...
They don't switch unless they use Perish Song, the moves Baton Pass or U-Turn, or you hit them with a move that they have a Pokemon which resists it.
eg. you use Surf against a Blissey, they may switch to Vaporeon to abuse its ability.
Timid 252/252 +1 LO Raikou using Thunderbolt does 79.5% - 94.1% to your Houndoom, so if you've taken Stealth Rock damage already you're dead, and you're pretty much guaranteed to take over 80% damage.
You've got the Nature and EVs for the mixed Choice Scarf Palkia set, seeming you have all special moves, you'll want to change your nature to Timid and stick the 4 Atk EVs in HP.