Diancie-Mega @ Diancite  
Ability: Magic Bounce  
Happiness: 0  
EVs: 4 Atk / 252 SpA / 252 Spe  
Hasty Nature  
- Diamond Storm  
- Earth Power  
- Moonblast  
- Stealth Rock  

Blacephalon @ Choice Specs  
Ability: Beast Boost  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
- Overheat  
- Shadow Ball  
- Flamethrower  
- Knock Off