Nihilego @ Black Sludge  
Ability: Beast Boost  
EVs: 80 Def / 176 SpA / 252 Spe  
Timid Nature  
- Stealth Rock  
- Power Gem  
- Sludge Bomb  
- Knock Off / Grass Knot / Thunderbolt  

Nihilego @ Power Herb  
Ability: Beast Boost  
EVs: 80 Def / 176 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Meteor Beam  
- Power Gem / Thunderbolt  
- Sludge Wave  
- Grass Knot