Ho-Oh @ Choice Band  
Ability: Regenerator  
EVs: 248 HP / 208 Atk / 52 SpD  
Adamant Nature  
- Sacred Fire  
- Brave Bird  
- Earthquake  
- Whirlwind  

Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 96 HP / 160 SpD / 252 Spe  
Jolly Nature  
- Knock Off  
- Roost  
- U-turn  
- Defog  

Necrozma-Dusk-Mane @ Leftovers  
Ability: Prism Armor  
EVs: 252 HP / 136 Def / 120 Spe  
Impish Nature  
- Dragon Dance  
- Earthquake  
- Moonlight  
- Sunsteel Strike  

Eternatus @ Sitrus Berry  
Ability: Pressure  
EVs: 252 HP / 156 SpD / 100 Spe  
Timid Nature  
IVs: 0 Atk  
- Toxic  
- Mystical Fire  
- Recover  
- Dynamax Cannon  

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

Groudon @ Leftovers  
Ability: Drought  
EVs: 252 HP / 236 Def / 20 Spe  
Impish Nature  
- Stealth Rock  
- Toxic  
- Precipice Blades  
- Stone Edge