Giratina @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Scald  
- Worry Seed  
- Baneful Bunker  
- Stealth Rock  

Groudon @ Soft Sand  
Ability: Mold Breaker  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Thousand Arrows  
- Glare  
- Strength Sap  
- Spikes  

Xerneas @ Heavy-Duty Boots  
Ability: Pixilate  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
- Boomburst  
- Rapid Spin  
- Volt Switch  
- Strength Sap  

Blissey (F) @ Shed Shell  
Ability: Imposter  
EVs: 252 HP / 252 Def / 252 SpD / 252 Spe  
Calm Nature  
IVs: 0 Atk  
- Jungle Healing  
- Shore Up  
- Court Change  
- Topsy-Turvy  

Eternatus @ Black Sludge  
Ability: Mold Breaker  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Nasty Plot  
- Sludge Bomb  
- Core Enforcer  
- Earth Power  

Registeel @ Leftovers  
Ability: Prankster  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Anchor Shot  
- Topsy-Turvy  
- Roost  
- Court Change