Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 252 HP / 4 Atk / 252 SpD  
Careful Nature  
IVs: 23 Spe  
- Foul Play  
- Defog  
- Roost  
- U-turn  

Groudon @ Leftovers  
Ability: Drought  
EVs: 252 HP / 252 Def / 4 Spe  
Impish Nature  
- Earthquake  
- Rock Tomb  
- Swords Dance  
- Thunder Wave  

Zacian-Crowned @ Rusted Sword  
Ability: Intrepid Sword  
EVs: 4 HP / 252 Atk / 252 Spe  
Adamant Nature  
- Behemoth Blade  
- Close Combat  
- Assurance  
- Wild Charge  

Reshiram @ Life Orb  
Ability: Turboblaze  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Dragon Dance  
- Flare Blitz  
- Outrage  
- Roost  

Eternatus @ Black Sludge  
Ability: Pressure  
EVs: 252 HP / 212 SpD / 44 Spe  
Calm Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Flamethrower  
- Toxic  
- Recover  

Necrozma-Dusk-Mane @ Rocky Helmet  
Ability: Prism Armor  
EVs: 248 HP / 252 Def / 8 Spe  
Impish Nature  
- Stealth Rock  
- Sunsteel Strike  
- Earthquake  
- Morning Sun