Ho-Oh @ Heavy-Duty Boots  
Ability: Regenerator  
EVs: 248 HP / 16 Atk / 176 Def / 4 SpD / 64 Spe  
Impish Nature  
- Curse  
- Brave Bird  
- Sacred Fire  
- Roost  

Corviknight @ Venusaurite  
Ability: Pressure  
EVs: 248 HP / 252 Def / 8 SpD  
Impish Nature  
- Defog  
- Roost  
- U-turn  
- Body Press  

Eternatus @ Life Orb  
Ability: Pressure  
EVs: 120 Def / 220 SpA / 164 Spe  
Modest Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Sludge Bomb  
- Recover  
- Flamethrower  

Groudon @ Leftovers  
Ability: Drought  
EVs: 252 HP / 252 Atk / 4 SpD  
Adamant Nature  
- Precipice Blades  
- Stealth Rock  
- Stone Edge  
- Swords Dance  

Pheromosa @ Aerodactylite  
Ability: Beast Boost  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Triple Axel  
- U-turn  
- Rapid Spin  
- Close Combat  

Mew @ Sablenite  
Ability: Synchronize  
EVs: 252 HP / 252 Def / 4 SpD  
Bold Nature  
IVs: 0 Atk  
- Counter  
- Earth Power  
- Ice Beam  
- Recover