Cobalion @ Shuca Berry  
Ability: Justified  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Stealth Rock 
- Iron Head  
- Close Combat  
- Swords Dance
M-Amph usually brings in either special walls like Florges, Snorlax, Blissey, or Umbreon, or a Ground type to block Volt Switch. Cobalion beats most of the bulky mons that take little from Volt Switch while also serving as a one time switch in to certain Grounds like Krook and Mamo if you get Volt blocked. Rocks also work very well with Volt Switch for obvious reasons.