Eternatus @ Dragonium Z  
Ability: Pressure  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Sludge Bomb  
- Flamethrower  
- Recover  

Necrozma-Dusk-Mane @ Leftovers  
Ability: Prism Armor  
EVs: 252 HP / 188 Def / 60 SpD / 8 Spe  
Impish Nature  
- Morning Sun  
- Stealth Rock  
- Toxic  
- Sunsteel Strike  

Xerneas @ Power Herb  
Ability: Fairy Aura  
EVs: 248 HP / 252 SpA / 8 SpD  
Modest Nature  
IVs: 0 Atk  
- Geomancy  
- Moonblast  
- Hidden Power [Fire]  
- Thunder  

Ditto @ Choice Scarf  
Ability: Imposter  
EVs: 248 HP / 8 Atk / 252 Def  
Impish Nature  
IVs: 30 Atk  
- Transform  

Lugia @ Heavy-Duty Boots  
Ability: Multiscale  
EVs: 252 HP / 252 Def / 4 Spe  
Impish Nature  
IVs: 0 Atk  
- Substitute  
- Toxic  
- Roost  
- Whirlwind  

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