Wigglytuff @ Leftovers
Ability: Competitive
EVs: 4 HP / 252 Def / 252 SpD
Bold Nature
- Calm Mind
- Wish
- Magic Coat
- Dazzling Gleam

Basically wish + calm mind, boost and win... Magic Coat is to reflect status, and mainly taunt, as Wigglytuff is seen as a support pokemon, so it's would often be taunt bait. An option over that is Heal Bell to heal status.  Gothitelle + Magnezone support is often appreciate to rid poison types and steel types like Ferrothorn and Scizor and Mega Saur