Eternatus @ Sitrus Berry  
Ability: Pressure  
EVs: 240 HP / 252 SpD / 16 Spe  
Calm Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Toxic  
- Recover  
- Mystical Fire  

Xerneas @ Leftovers  
Ability: Fairy Aura  
EVs: 252 HP / 252 Def / 4 SpD  
Bold Nature  
IVs: 0 Atk  
- Aromatherapy  
- Moonblast  
- Rest  
- Sleep Talk  

Rayquaza @ Life Orb  
Ability: Air Lock  
EVs: 252 Atk / 4 SpA / 252 Spe  
Naughty Nature  
- Draco Meteor  
- Dragon Ascent  
- Extreme Speed  
- V-create  

Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 48 HP / 208 Atk / 252 Spe  
Jolly Nature  
- Knock Off  
- Roost  
- Sucker Punch  
- Taunt  

Calyrex-Shadow @ Choice Scarf  
Ability: As One (Spectrier)  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Astral Barrage  
- Encore  
- Trick  
- Aromatherapy  

Necrozma-Dusk-Mane @ Shed Shell  
Ability: Prism Armor  
EVs: 252 HP / 40 Def / 208 SpD / 8 Spe  
Careful Nature  
- Iron Head  
- Thunder Wave  
- Morning Sun  
- Stealth Rock