Gengar-Mega (F) @ Gengarite  
Ability: Levitate  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Shadow Ball  
- Sludge Wave  
- Taunt  
- Substitute  

Klefki (F) @ Leftovers  
Ability: Prankster  
EVs: 252 HP / 240 SpD / 16 Spe  
Careful Nature  
- Thunder Wave  
- Substitute  
- Play Rough  
- Toxic  

Giratina @ Leftovers  
Ability: Pressure  
EVs: 248 HP / 252 Def / 8 Spe  
Impish Nature  
- Rest  
- Defog  
- Toxic  
- Dragon Tail  

Mewtwo @ Life Orb  
Ability: Unnerve  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Taunt  
- Psystrike  
- Focus Blast  
- Ice Beam  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 248 HP / 248 SpD / 12 Spe  
Careful Nature  
- Stealth Rock  
- Toxic  
- Precipice Blades  
- Dragon Tail  

Xerneas @ Power Herb  
Ability: Fairy Aura  
EVs: 120 HP / 56 Def / 252 SpA / 80 Spe  
Modest Nature  
- Geomancy  
- Moonblast  
- Focus Blast  
- Hidden Power [Rock]