Cobalion @ Life Orb  
Ability: Magic Guard  
EVs: 4 Atk / 252 SpA / 252 Spe  
Naive Nature  
- Close Combat  
- Steel Beam  
- Volt Switch  
- Stealth Rock / Taunt / Calm Mind / Rock Polish

Cobalion @ Rocky Helmet / Chople berry
Ability: Regenerator  
EVs: 252 HP / 144 Def / 112 Spe  
Impish Nature  
- Close Combat  
- Volt Switch  
- Taunt / Toxic  
- Stealth Rock