Xellyrem (Kyurem-Black) @ Weakness Policy  
Ability: Teravolt  
EVs: 104 HP / 252 SpA / 152 Spe  
Modest Nature  
IVs: 0 Atk  
- Ice Beam  
- Earth Power  
- Reflect  
- Draco Meteor  

Xellyzard (Charizard-Mega-X) @ Charizardite X  
Ability: Tough Claws  
EVs: 248 HP / 12 Atk / 72 Def / 176 Spe  
Adamant Nature  
- Flame Charge  
- Swords Dance  
- Flare Blitz  
- Outrage  

Xellygross (Metagross-Mega) @ Metagrossite  
Ability: Tough Claws  
EVs: 252 HP / 112 Atk / 144 Def  
Impish Nature  
- Thunder Punch  
- Meteor Mash  
- Bullet Punch  
- Ice Punch