Groudon @ Leftovers  
Ability: Drought  
EVs: 252 HP / 136 Def / 104 SpD / 16 Spe  
Impish Nature  
- Stealth Rock  
- Precipice Blades  
- Toxic  
- Rock Tomb  

Ditto @ Choice Scarf  
Ability: Imposter  
EVs: 252 HP / 4 Atk / 252 Def  
Relaxed Nature  
IVs: 0 Spe  
- Transform  

Kyogre @ Leftovers  
Ability: Drizzle  
EVs: 252 HP / 204 Def / 36 SpD / 16 Spe  
Bold Nature  
IVs: 0 Atk  
- Calm Mind  
- Scald  
- Thunder  
- Rest  

Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 48 HP / 4 Def / 204 SpD / 252 Spe  
Jolly Nature  
- Defog  
- Knock Off  
- Roost  
- Taunt  

Eternatus @ Heavy-Duty Boots  
Ability: Pressure  
EVs: 252 HP / 92 SpD / 164 Spe  
Hasty Nature  
- Dynamax Cannon  
- Light Screen  
- Dragon Tail  
- Recover  

Necrozma-Dusk-Mane @ Leftovers  
Ability: Prism Armor  
EVs: 248 HP / 200 Def / 60 Spe  
Impish Nature  
- Dragon Dance  
- Sunsteel Strike  
- Morning Sun  
- Knock Off