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

Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 72 HP / 252 SpD / 184 Spe  
Jolly Nature  
- Knock Off  
- Foul Play  
- Defog  
- Roost  

Eternatus @ Heavy-Duty Boots  
Ability: Pressure  
EVs: 164 HP / 252 SpD / 92 Spe  
Timid Nature  
- Flamethrower  
- Sludge Bomb  
- Dragon Tail  
- Recover  

Necrozma-Dusk-Mane @ Leftovers  
Ability: Prism Armor  
EVs: 248 HP / 120 Atk / 140 Spe  
Adamant Nature  
- Dragon Dance  
- Moonlight  
- Knock Off  
- Sunsteel Strike  

Groudon @ Leftovers  
Ability: Drought  
EVs: 252 HP / 240 Def / 16 Spe  
Impish Nature  
- Precipice Blades  
- Stone Edge  
- Stealth Rock  
- Toxic  

Ho-Oh @ Heavy-Duty Boots  
Ability: Regenerator  
EVs: 248 HP / 192 Atk / 52 SpD / 16 Spe  
Adamant Nature  
- Sacred Fire  
- Brave Bird  
- Thunder Wave  
- Defog