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

Serperior @ Leftovers  
Ability: Contrary  
EVs: 112 HP / 164 SpA / 232 Spe  
Timid Nature  
- Leaf Storm  
- Knock Off  
- Hidden Power [Fire]  
- Glare