Marshadow @ Life Orb  
Ability: Technician  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Shadow Sneak  
- Spectral Thief  
- Close Combat  
- Rock Tomb  

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

Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 248 HP / 72 Def / 184 SpD  
Careful Nature  
- Knock Off  
- U-turn  
- Defog  
- Roost  

Eternatus @ Heavy-Duty Boots  
Ability: Pressure  
EVs: 128 HP / 252 SpD / 128 Spe  
Timid Nature  
IVs: 0 Atk  
- Recover  
- Sludge Bomb  
- Dynamax Cannon  
- Mystical Fire  

Necrozma-Dusk-Mane @ Leftovers  
Ability: Prism Armor  
EVs: 216 HP / 252 SpD / 40 Spe  
Careful Nature  
- Morning Sun  
- Thunder Wave  
- Stealth Rock  
- Iron Head  

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