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

Eternatus @ Poison Barb  
Ability: Pressure  
EVs: 164 HP / 100 SpA / 112 SpD / 132 Spe  
Timid Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Sludge Bomb  
- Flamethrower  
- Recover  

Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 96 HP / 160 SpD / 252 Spe  
Jolly Nature  
- Taunt  
- Foul Play  
- Roost  
- Defog  

Tapu Fini @ Leftovers  
Ability: Misty Surge  
EVs: 248 HP / 200 Def / 60 Spe  
Bold Nature  
IVs: 0 Atk  
- Haze  
- Taunt  
- Moonblast  
- Nature's Madness  

Groudon @ Choice Band  
Ability: Drought  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Precipice Blades  
- Stone Edge  
- Heat Crash  
- Shadow Claw  

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