Wall (Lileep) @ Leftovers
Ability: Storm Drain
EVs: 252 HP / 252 Def / 4 SpD 
Relaxed / Bold Nature
- Stealth Rock
- Giga Drain / Earth Power
- Rock Slide / Hidden Power Rock / Toxic
- Recover

Other Options
- 252 HP / 4 Def / 252 SpD
- Sassy / Calm Nature