Ho-Oh @ Heavy-Duty Boots  
Ability: Regenerator  
EVs: 248 HP / 188 Def / 56 SpD / 16 Spe  
Impish Nature  
- Sacred Fire  
- Thunder Wave  
- Defog  
- Brave Bird  

Groudon @ Leftovers  
Ability: Drought  
EVs: 252 HP / 232 Def / 24 Spe  
Impish Nature  
- Stealth Rock  
- Precipice Blades  
- Toxic  
- Stone Edge  

Yveltal @ Life Orb  
Ability: Dark Aura  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Dark Pulse  
- Oblivion Wing  
- Taunt  
- Roost  

Necrozma-Dusk-Mane @ Rocky Helmet  
Ability: Prism Armor  
EVs: 252 HP / 196 Def / 60 Spe  
Impish Nature  
- Dragon Dance  
- Knock Off  
- Moonlight  
- Sunsteel Strike  

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

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