Blacephalon @ Choice Specs  
Ability: Beast Boost  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Fire Blast  
- Shadow Ball  
- Trick  
- Psyshock  

Calyrex-Shadow @ Leftovers  
Ability: As One (Spectrier)  
EVs: 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Substitute  
- Leech Seed  
- Nasty Plot  
- Astral Barrage  

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

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

Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 252 HP / 252 SpD / 4 Spe  
Calm Nature  
IVs: 0 Atk  
- Roost  
- Snarl  
- Foul Play  
- Defog  

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