Kyogre @ Life Orb  
Ability: Drizzle  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Calm Mind  
- Origin Pulse  
- Ice Beam  
- Hidden Power [Flying]  

Necrozma-Dusk-Mane @ Rocky Helmet  
Ability: Prism Armor  
EVs: 252 HP / 188 Def / 32 SpD / 36 Spe  
Impish Nature  
- Sunsteel Strike  
- Morning Sun  
- Thunder Wave  
- Stealth Rock  

Zacian-Crowned @ Rusted Sword  
Ability: Intrepid Sword  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Behemoth Blade  
- Substitute  
- Wild Charge  
- Crunch  

Arceus-Dark @ Dread Plate  
Ability: Multitype  
EVs: 248 HP / 220 Def / 40 Spe  
Bold Nature  
IVs: 0 Atk  
- Whirlpool  
- Perish Song  
- Refresh  
- Recover  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 252 SpA / 4 SpD / 252 Spe  
Hasty Nature  
- Hidden Power [Ice]  
- Stone Edge  
- Precipice Blades  
- Eruption  

Ho-Oh @ Heavy-Duty Boots  
Ability: Regenerator  
EVs: 248 HP / 200 Def / 52 SpD / 8 Spe  
Careful Nature  
- Defog  
- Protect  
- Sacred Fire  
- Whirlwind