Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 248 HP / 112 Def / 16 SpD / 132 Spe  
Jolly Nature  
- Roost  
- Foul Play  
- Sucker Punch  
- Defog  

Necrozma-Dusk-Mane @ Life Orb  
Ability: Prism Armor  
EVs: 252 HP / 12 Atk / 120 SpD / 124 Spe  
Adamant Nature  
- Dragon Dance  
- Sunsteel Strike  
- Morning Sun  
- Photon Geyser  

Groudon @ Leftovers  
Ability: Drought  
EVs: 252 Atk / 4 Def / 252 Spe  
Adamant Nature  
- Stealth Rock  
- Precipice Blades  
- Stone Edge  
- Heat Crash  

Ferrothorn @ Rocky Helmet  
Ability: Iron Barbs  
EVs: 252 HP / 252 Def / 4 Spe  
Impish Nature  
- Leech Seed  
- Spikes  
- Knock Off  
- Body Press  

Eternatus @ Shuca Berry  
Ability: Pressure  
EVs: 248 HP / 168 SpD / 92 Spe  
Timid Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Recover  
- Toxic  
- Mystical Fire  

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