Eternatus @ Black Sludge  
Ability: Adaptability  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Core Enforcer  
- Sludge Bomb  
- Blue Flare  
- Final Gambit  

Rayquaza @ Life Orb  
Ability: Triage  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Oblivion Wing  
- Nasty Plot  
- Core Enforcer  
- Spore  

Yveltal @ Heavy-Duty Boots  
Ability: Volt Absorb  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Knock Off  
- Recover  
- Rapid Spin  
- U-turn  

Heatran @ Leftovers  
Ability: Magic Bounce  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Anchor Shot  
- Roost  
- Entrainment  
- Spectral Thief  

Regigigas @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Facade  
- Shift Gear  
- Spectral Thief  
- Spikes  

Swampert @ Rocky Helmet  
Ability: Fur Coat  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Thousand Waves  
- Volt Switch  
- Topsy-Turvy  
- Milk Drink