Mewtwo @ Terrain Extender  
Ability: Psychic Surge  
EVs: 248 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Spikes  
- Expanding Force  
- Thunder Cage  
- Teleport  

Eternatus @ Flame Orb  
Ability: Flare Boost  
EVs: 248 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Nasty Plot  
- Core Enforcer  
- Sludge Wave  
- Blue Flare  

Lunala @ Psychic Seed  
Ability: Unburden  
EVs: 248 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Rash Nature  
IVs: 0 Atk / 0 SpD  
- Psystrike  
- Moongeist Beam  
- Thunder Cage  
- Nasty Plot  

Marshadow @ Psychic Seed  
Ability: Unburden  
EVs: 4 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Poltergeist  
- Swords Dance  
- Thunderous Kick  
- Taunt  

Regigigas @ Toxic Orb  
Ability: Poison Heal  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Facade  
- Swords Dance  
- Thunderous Kick  
- King's Shield  

Xerneas @ Toxic Orb  
Ability: Poison Heal  
EVs: 248 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Moonblast  
- Quiver Dance  
- Thunder Cage  
- Strength Sap