Rotom-Wash @ Leftovers  
Ability: Levitate  
EVs: 252 HP / 216 Def / 40 Spe  
Bold Nature  
IVs: 0 Atk  
- Hydro Pump  
- Volt Switch  
- Defog  
- Pain Split  

Eternatus @ Shed Shell/Black Sludge/Haban Berry  
Ability: Pressure  
EVs: 252 HP / 200 Def / 56 Spe  
Timid Nature  
- Dynamax Cannon  
- Flamethrower  
- Toxic  
- Recover  

Necrozma-Dusk-Mane @ Rocky Helmet  
Ability: Prism Armor  
EVs: 252 HP / 252 Def / 4 SpD  
Impish Nature  
- Moonlight  
- Sunsteel Strike  
- Earthquake  
- Thunder Wave  

Marshadow @ Life Orb  
Ability: Technician  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Poltergeist  
- Shadow Sneak  
- Close Combat  
- Bulk Up  

Blissey (F) @ Heavy-Duty Boots  
Ability: Serene Grace  
EVs: 4 HP / 252 Def / 252 SpD  
Calm Nature  
- Toxic  
- Seismic Toss  
- Soft-Boiled  
- Teleport  

Zacian-Crowned @ Rusted Sword  
Ability: Intrepid Sword  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Behemoth Blade  
- Close Combat  
- Wild Charge  
- Swords Dance