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

Groudon @ Leftovers  
Ability: Drought  
EVs: 228 HP / 12 Atk / 196 Def / 72 Spe  
Impish Nature  
- Stealth Rock  
- Thunder Wave  
- Rock Slide  
- Earthquake  

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

Magearna-Original @ Leftovers  
Ability: Soul-Heart  
EVs: 252 HP / 136 Def / 120 SpD  
Bold Nature  
IVs: 0 Atk  
- Volt Switch  
- Fleur Cannon  
- Pain Split  
- Power Swap  

Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 136 HP / 176 SpD / 196 Spe  
Jolly Nature  
- Foul Play  
- U-turn  
- Roost  
- Defog  

Eternatus @ Black Sludge  
Ability: Pressure  
EVs: 240 HP / 176 SpD / 92 Spe  
Timid Nature  
- Dynamax Cannon  
- Recover  
- Flamethrower  
- Toxic