Hazard control (Coalossal) @ Heavy-Duty Boots  
Ability: Regenerator  
EVs: 248 HP / 252 Def / 8 SpD  or 248 HP / 8 Def / 252 SpD Sassy Nature
Relaxed Nature  
- Rapid Spin  
- Stealth Rock / Spikes
- Rock Slide / Rock Tomb
- Scald / Lava Plume / Scorching Sands / Spikes