Mew @ Focus Sash  
Ability: Synchronize  
Shiny: Yes  
EVs: 252 HP / 4 Atk / 252 Spe  
Jolly Nature  
- Spikes  
- Taunt  
- Stealth Rock  
- Explosion  

Ditto @ Choice Scarf  
Ability: Imposter  
Shiny: Yes  
EVs: 248 HP / 8 Atk / 252 Def  
Impish Nature  
IVs: 30 Atk  
- Transform  

Zacian-Crowned @ Rusted Sword  
Ability: Intrepid Sword  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Swords Dance  
- Behemoth Blade  
- Wild Charge  
- Close Combat  

Yveltal @ Life Orb  
Ability: Dark Aura  
EVs: 4 Atk / 252 SpA / 252 Spe  
Hasty Nature  
- Sucker Punch  
- Dark Pulse  
- Oblivion Wing  
- Heat Wave  

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

Eternatus @ Life Orb  
Ability: Pressure  
EVs: 40 Def / 252 SpA / 216 Spe  
Timid Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Flamethrower  
- Recover  
- Toxic Spikes