Cloyster @ Focus Sash  
Ability: Shell Armor  
EVs: 252 Atk / 4 Def / 252 Spe  
Adamant Nature  
- Shell Smash  
- Icicle Spear  
- Spikes  
- Rapid Spin  

Yveltal @ Life Orb  
Ability: Dark Aura  
EVs: 12 HP / 4 Atk / 252 SpA / 240 Spe  
Modest Nature  
- Dark Pulse  
- Oblivion Wing  
- U-turn  
- Sucker Punch  

Eternatus @ Power Herb  
Ability: Pressure  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Meteor Beam  
- Flamethrower  
- Sludge Bomb  

Necrozma-Dusk-Mane @ Lum Berry  
Ability: Prism Armor  
EVs: 248 Atk / 8 SpD / 252 Spe  
Jolly Nature  
- Dragon Dance  
- Sunsteel Strike  
- Photon Geyser  
- Earthquake  

Xerneas @ Power Herb  
Ability: Fairy Aura  
EVs: 168 Def / 252 SpA / 88 Spe  
Modest Nature  
IVs: 0 Atk  
- Geomancy  
- Moonblast  
- Thunder  
- Focus Blast  

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