Groudon @ Lum Berry  
Ability: Drought  
EVs: 176 HP / 80 Atk / 252 Spe  
Jolly Nature  
- Bulk Up  
- Stone Edge  
- Precipice Blades  
- Rest  

Necrozma-Dusk-Mane @ Custap Berry  
Ability: Prism Armor  
EVs: 248 HP / 248 Def / 12 Spe  
Impish Nature  
- Stealth Rock  
- Sunsteel Strike  
- Toxic  
- Morning Sun  

Eternatus @ Heavy-Duty Boots  
Ability: Pressure  
EVs: 252 HP / 124 SpD / 132 Spe  
Timid Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Mystical Fire  
- Toxic  
- Recover  

Kyogre @ Choice Scarf  
Ability: Drizzle  
EVs: 4 HP / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Water Spout  
- Origin Pulse  
- Ice Beam  
- Thunder  

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

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