Gyarados @ Flyinium Z  
Ability: Intimidate  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Dragon Dance  
- Bounce  
- Waterfall  
- Earthquake  

Garchomp-Mega @ Garchompite  
Ability: Sand Force  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Swords Dance  
- Earthquake  
- Fire Fang  
- Scale Shot