Marshadow @ Choice Band  
Ability: Technician  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Spectral Thief  
- Close Combat  
- Shadow Sneak  
- Ice Punch  

Kyogre @ Leftovers  
Ability: Drizzle  
EVs: 252 HP / 236 Def / 20 Spe  
Bold Nature  
IVs: 0 Atk  
- Rest  
- Calm Mind  
- Sleep Talk  
- Scald  

Eternatus @ Yache Berry  
Ability: Pressure  
EVs: 252 HP / 128 SpD / 128 Spe  
Timid Nature  
IVs: 0 Atk  
- Toxic  
- Mystical Fire  
- Recover  
- Dynamax Cannon  

Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 56 HP / 200 SpD / 252 Spe  
Jolly Nature  
- Knock Off  
- Foul Play  
- Defog  
- Roost  

Groudon @ Lum Berry  
Ability: Drought  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Swords Dance  
- Precipice Blades  
- Stone Edge  
- Aerial Ace  

Necrozma-Dusk-Mane @ Rocky Helmet  
Ability: Prism Armor  
EVs: 252 HP / 248 Def / 8 Spe  
Impish Nature  
- Toxic  
- Sunsteel Strike  
- Stealth Rock  
- Morning Sun