Slugma @ Eviolite
Ability: Flame Body
EVs: 196 HP / 116 Def / 196 SpD
IVs: 0 Atk
Bold / Calm Nature
- Iron Defense
Iron Defense and Amnesia, then tank everything. Recover for HP, and Flamethrower to attack.
You gotta be lucky to pull this off, but if you do, then you tank anything.