Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 252 HP / 176 Def / 80 Spe  
Impish Nature  
- Foul Play  
- Knock Off  
- Sucker Punch  
- Roost  

Marshadow @ Life Orb  
Ability: Technician  
EVs: 252 Atk / 4 Def / 252 Spe  
Adamant Nature  
- Spectral Thief  
- Close Combat  
- Shadow Sneak  
- Bulk Up  

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

Eternatus @ Black Sludge  
Ability: Pressure  
EVs: 240 HP / 252 SpD / 16 Spe  
Timid Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Recover  
- Flamethrower  
- Toxic  

Necrozma-Dusk-Mane @ Leftovers  
Ability: Prism Armor  
EVs: 252 HP / 4 Def / 252 SpD  
Careful Nature  
- Sunsteel Strike  
- Morning Sun  
- Thunder Wave  
- Stealth Rock  

Regieleki @ Heavy-Duty Boots  
Ability: Transistor  
EVs: 4 Def / 252 SpA / 252 Spe  
Modest Nature  
- Volt Switch  
- Thunderbolt  
- Rapid Spin  
- Thunder Wave