Diancie @ Diancite  
Ability: Clear Body  
EVs: 4 Atk / 252 SpA / 252 Spe  
Naive Nature  
- Diamond Storm  
- Moonblast  
- Earth Power  
- Protect  

Volcarona @ Lum Berry  
Ability: Flame Body  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 1 Atk / 30 SpA / 30 SpD  
- Quiver Dance  
- Fire Blast  
- Bug Buzz  
- Hidden Power [Ground]  

Magnezone @ Choice Specs  
Ability: Magnet Pull  
EVs: 168 HP / 252 SpA / 88 Spe  
Modest Nature  
IVs: 0 Atk / 30 SpA / 30 Spe  
- Volt Switch  
- Hidden Power [Fire]  
- Flash Cannon  
- Thunderbolt