Nidostall 1 Atk (Nidoqueen) @ Black Sludge  
Ability: Poison Point  
EVs: 252 HP / 252 Def / 4 SpD  
Impish Nature  
- Earthquake  
- Roar  
- Protect  
- Toxic Spikes  /  Stealth Rock

Nidostall 2 Atk (Nidoqueen) @ Black Sludge  
Ability: Poison Point  
EVs: 252 HP / 252 Def / 4 SpD  
Relaxed Nature  
- Earthquake  
- Ice Beam  / Fire Blast
- Roar  
- Toxic Spikes  /  Stealth Rock