Eternatus  
Ability: Pressure  
EVs: 128 HP / 252 SpD / 128 Spe  
Timid Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Mystical Fire  
- Toxic  
- Recover  

Necrozma-Dusk-Mane @ Rocky Helmet  
Ability: Prism Armor  
EVs: 252 HP / 4 Atk / 252 Def  
Impish Nature  
- Stealth Rock  
- Sunsteel Strike  
- Earthquake  
- Moonlight  

Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 16 HP / 240 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Foul Play  
- Snarl  
- Roost  
- Defog  

Zacian-Crowned @ Rusted Sword  
Ability: Intrepid Sword  
EVs: 252 Atk / 144 SpD / 112 Spe  
Adamant Nature  
- Swords Dance  
- Play Rough  
- Wild Charge  
- Crunch  

Xerneas @ Power Herb  
Ability: Fairy Aura  
EVs: 168 HP / 252 SpA / 88 Spe  
Modest Nature  
IVs: 0 Atk  
- Rest  
- Sleep Talk  
- Geomancy  
- Moonblast  

Calyrex-Shadow @ Choice Specs  
Ability: As One (Spectrier)  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Astral Barrage  
- Psyshock  
- Trick  
- Aromatherapy