Amoonguss @ Black Sludge  
Ability: Regenerator  
EVs: 252 HP / 176 Def / 80 SpD  
Bold Nature  
IVs: 0 Atk  
- Spore  
- Giga Drain  
- Sludge Bomb  
- Hidden Power [Fire]  / Foul Play

Amoonguss @ Black Sludge  
Ability: Regenerator  
EVs: 252 HP / 8 Def / 248 SpD  
Calm Nature  
IVs: 0 Atk  
- Spore  
- Hidden Power [Fire]  
- Sludge Bomb  
- Giga Drain