Eternatus @ Dragon Fang  
Ability: Magic Bounce  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Nasty Plot  
- Core Enforcer  
- Sludge Bomb  
- Recover  

Zamazenta-Crowned @ Heavy-Duty Boots  
Ability: Ice Scales  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Anchor Shot  
- Thunderous Kick  
- Slack Off  
- Spectral Thief  

Necrozma-Dusk-Mane @ Rocky Helmet  
Ability: Liquid Ooze  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Anchor Shot  
- Strength Sap  
- Spikes  
- Roost  

Xerneas @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
- Quiver Dance  
- Will-O-Wisp  
- Moonblast  
- Knock Off  

Giratina @ Wiki Berry  
Ability: Prankster  
EVs: 252 HP / 252 Def / 252 SpD / 252 Spe  
Bold Nature  
IVs: 0 Atk  
- Haze  
- Entrainment  
- Stealth Rock  
- Strength Sap  

Chansey (F) @ Shed Shell  
Ability: Imposter  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Defog  
- Haze  
- Metal Burst  
- Soft-Boiled