Volcanion @ Heavy-Duty Boots  
Ability: Water Absorb  
EVs: 68 HP / 252 SpA / 188 Spe  
Modest Nature  
IVs: 0 Atk  
- Arid Absorption  
- Steam Eruption  
- Earth Power  
- Flamethrower  

Diancie-Mega @ Diancite  
Ability: Magic Bounce  
EVs: 4 Atk / 252 SpA / 252 Spe  
Hasty Nature  
- Stealth Rock  
- Diamond Storm  
- Moonblast  
- Earth Power