Arceus @ Leftovers  
Ability: Multitype  
EVs: 36 HP / 252 Atk / 220 Spe  
Adamant Nature  
- Swords Dance  
- Extreme Speed  
- Earthquake  
- Shadow Claw  

Xerneas @ Power Herb  
Ability: Fairy Aura  
EVs: 108 Def / 252 SpA / 148 Spe  
Modest Nature  
IVs: 0 Atk  
- Geomancy  
- Moonblast  
- Thunder  
- Hidden Power [Fire]  

Rayquaza-Mega @ Choice Scarf  
Ability: Air Lock  
EVs: 252 Atk / 4 SpA / 252 Spe  
Lonely Nature  
- Dragon Ascent  
- V-create  
- Draco Meteor  
- Toxic  

Necrozma-Dusk-Mane @ Rocky Helmet  
Ability: Prism Armor  
EVs: 252 HP / 252 Def / 4 SpD  
Impish Nature  
- Sunsteel Strike  
- Stealth Rock  
- Morning Sun  
- Toxic  

Eternatus @ Life Orb  
Ability: Pressure  
EVs: 76 HP / 252 SpA / 180 Spe  
Timid Nature  
IVs: 0 Atk  
- Sludge Bomb  
- Dynamax Cannon  
- Flamethrower  
- Recover  

Arceus-Water @ Splash Plate  
Ability: Multitype  
EVs: 252 HP / 132 Def / 124 Spe  
Bold Nature  
IVs: 0 Atk  
- Whirlpool  
- Ice Beam  
- Recover  
- Perish Song