Magnezone @ Leftovers  
Ability: Magnet Pull  
EVs: 172 HP / 252 Def / 84 Spe  
Bold Nature  
- Iron Defense  
- Body Press  
- Thunderbolt  
- Substitute  

Melmetal @ Choice Band  
Ability: Iron Fist  
EVs: 32 HP / 252 Atk / 224 Spe  
Adamant Nature  
- Double Iron Bash  
- Earthquake  
- Superpower / Ice Punch
- Thunder Punch