Dialga @ Assault Vest  
Ability: Regenerator  
EVs: 252 HP / 4 SpA / 252 SpD  
Calm Nature  
IVs: 0 Atk  
- Flash Cannon  
- Fire Blast  
- Earth Power  
- Draco Meteor  

Eternatus @ Choice Specs  
Ability: Dragon's Maw  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Sludge Wave  
- Flamethrower  
- Draco Meteor  

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

Necrozma-Dusk-Mane @ Leftovers  
Ability: Dauntless Shield  
EVs: 252 HP / 4 Atk / 252 Def  
Impish Nature  
- Sunsteel Strike  
- Stealth Rock  
- Morning Sun  
- Earthquake  

Kyogre @ Choice Specs  
Ability: Primordial Sea  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Water Spout  
- Origin Pulse  
- Thunder  
- Ice Beam  

Xerneas @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Def / 4 SpA  
Bold Nature  
IVs: 0 Atk  
- Protect  
- Calm Mind  
- Moonblast  
- Psyshock