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

Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 252 HP / 4 Atk / 252 SpD  
Careful Nature  
IVs: 21 Spe  
- Roost  
- Defog  
- Knock Off  
- U-turn  

Eternatus @ Black Sludge  
Ability: Pressure  
EVs: 252 HP / 236 SpD / 20 Spe  
Timid Nature  
- Dragon Tail  
- Flamethrower  
- Recover  
- Toxic  

Groudon @ Lum Berry  
Ability: Drought  
EVs: 100 HP / 252 Atk / 156 Spe  
Adamant Nature  
- Rock Polish  
- Swords Dance  
- Precipice Blades  
- Stone Edge  

Zacian-Crowned @ Rusted Sword  
Ability: Intrepid Sword  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Close Combat  
- Play Rough  
- Fire Fang  
- Wild Charge  

Ditto @ Choice Scarf  
Ability: Imposter  
EVs: 248 HP / 8 Atk / 252 Def  
Impish Nature  
IVs: 30 Atk  
- Transform