Grimer @ Leftovers  
Ability: Stench  
EVs: 252 HP / 4 Atk / 252 SpD  
Careful Nature  
- Curse  
- Rest  
- Sleep Talk  
- Sludge Bomb

Grimer @ Choice Band  
Ability: Stench  
EVs: 252 HP / 252 Atk / 4 SpD  
Adamant Nature  
- Sludge Bomb  
- Return
- Hidden Power Ground 
- Explosion
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Optional Move(s): 
- N/A
Optional Item(s): 
- N/A
Optional Ability:  
- N/A
Optional EV/IV(s): 
- 252 Atk / 4 SpD  / 252 Spe (Adamant)