This thing has been wrecking for me, too.
Kangaskhan (F) @ Kangaskhanite
Ability: Scrappy
EVs: 252 HP / 252 Atk / 4 SDef
Adamant Nature
- Return
- Power-Up Punch
- Sucker Punch
- Shadow Claw
I've played around with a few things in the last slot: Earthquake, Crunch, Drain Punch, and even Fire...