Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 248 HP / 44 Atk / 8 Def / 24 SpD / 184 Spe  
Adamant Nature  
- Knock Off  
- U-turn  
- Roost  
- Defog  

Eternatus @ Expert Belt  
Ability: Pressure  
EVs: 152 SpA / 224 SpD / 132 Spe  
Modest Nature  
IVs: 0 Atk  
- Sludge Bomb  
- Draco Meteor  
- Flamethrower  
- Recover  

Ferrothorn @ Leftovers  
Ability: Iron Barbs  
EVs: 252 HP / 252 Def / 4 SpD  
Bold Nature  
IVs: 0 Atk  
- Body Press  
- Leech Seed  
- Iron Defense  
- Stealth Rock  

Groudon @ Lum Berry  
Ability: Drought  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Swords Dance  
- Precipice Blades  
- Dragon Tail  
- Stone Edge  

Necrozma-Dusk-Mane @ Leftovers  
Ability: Prism Armor  
EVs: 252 HP / 196 Def / 60 Spe  
Impish Nature  
- Dragon Dance  
- Knock Off  
- Sunsteel Strike  
- Moonlight  

Ditto @ Choice Scarf  
Ability: Imposter  
EVs: 248 HP / 8 Atk / 252 Def  
Relaxed Nature  
IVs: 0 Spe  
- Transform