Rayquaza @ Sitrus Berry  
Ability: Aerilate  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Extreme Speed  
- Dragon Darts  
- Earthquake  
- Belly Drum  

Celesteela @ Rocky Helmet  
Ability: Fur Coat  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Impish Nature  
- Anchor Shot  
- Slack Off  
- Entrainment  
- Nuzzle  

Chansey (F) @ Eviolite  
Ability: Imposter  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Impish Nature  
- Anchor Shot  
- Shore Up  
- Spikes  
- Nuzzle  

Eternatus @ Black Sludge  
Ability: Regenerator  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Trick  
- Volt Switch  
- Core Enforcer  
- Sludge Bomb  

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

Xerneas @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Moonblast  
- Rapid Spin  
- Strength Sap  
- Volt Switch