Mewtwo @ Leftovers  
Ability: Pressure  
EVs: 252 HP / 156 Def / 96 Spe  
Timid Nature  
IVs: 0 Atk  
- Taunt  
- Will-O-Wisp  
- Recover  
- Ice Beam  

Calyrex-Shadow @ Leftovers  
Ability: As One (Spectrier)  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Astral Barrage  
- Substitute  
- Nasty Plot  
- Encore  

Xerneas @ Power Herb  
Ability: Fairy Aura  
EVs: 252 HP / 252 Def / 4 SpD  
Bold Nature  
IVs: 0 Atk  
- Moonblast  
- Rest  
- Sleep Talk  
- Geomancy  

Necrozma-Dusk-Mane @ Shed Shell  
Ability: Prism Armor  
EVs: 252 HP / 216 SpD / 40 Spe  
Careful Nature  
- Stealth Rock  
- Moonlight  
- Iron Head  
- Thunder Wave  

Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 16 HP / 240 SpD / 252 Spe  
Jolly Nature  
- Knock Off  
- Taunt  
- Defog  
- Roost  

Eternatus @ Heavy-Duty Boots  
Ability: Pressure  
EVs: 164 HP / 252 SpD / 92 Spe  
Timid Nature  
- Recover  
- Toxic  
- Flamethrower  
- Dynamax Cannon