Xerneas @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Rapid Spin  
- Lava Plume  
- Moonblast  
- Quiver Dance  

Giratina @ Leftovers  
Ability: Magic Bounce  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Core Enforcer  
- Spectral Thief  
- Recover  
- Defog  

Shedinja @ Lum Berry  
Ability: Sturdy  
EVs: 252 HP / 252 Atk / 252 SpA  
Lonely Nature  
IVs: 0 Def / 0 SpD / 0 Spe  
- Pain Split  
- Parting Shot  
- Pursuit  
- Protect  

Kyogre-Primal @ Assault Vest  
Ability: Regenerator  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Revelation Dance  
- U-turn  
- Core Enforcer  
- Rapid Spin  

Mewtwo-Mega-Y @ Life Orb  
Ability: Sheer Force  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Hasty Nature  
- Bolt Strike  
- Psychic  
- Ice Beam  
- Blue Flare  

Blissey (F) @ Toxic Orb  
Ability: Imposter  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Fling  
- Soft-Boiled  
- Heal Bell  
- Parting Shot