Calyrex-Shadow @ Colbur Berry  
Ability: As One (Spectrier)  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Nasty Plot  
- Draining Kiss  
- Psyshock  
- Astral Barrage  

Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 72 HP / 252 SpD / 184 Spe  
Jolly Nature  
IVs: 0 Atk  
- Foul Play  
- Taunt  
- Roost  
- Snarl  

Necrozma-Dusk-Mane @ Leftovers  
Ability: Prism Armor  
EVs: 252 HP / 224 Def / 32 Spe  
Impish Nature  
- Thunder Wave  
- Sunsteel Strike  
- Moonlight  
- Stealth Rock  

Eternatus @ Life Orb  
Ability: Pressure  
EVs: 32 HP / 88 Def / 252 SpA / 136 Spe  
Modest Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Flamethrower  
- Sludge Bomb  
- Recover  

Ho-Oh @ Heavy-Duty Boots  
Ability: Regenerator  
EVs: 252 HP / 204 Def / 52 SpD  
Impish Nature  
- Sacred Fire  
- Thunder Wave  
- Whirlwind  
- Defog  

Xerneas @ Power Herb  
Ability: Fairy Aura  
EVs: 252 HP / 4 Def / 252 SpA  
Modest Nature  
IVs: 0 Atk  
- Geomancy  
- Moonblast  
- Thunder  
- Substitute