Ho-Oh @ Heavy-Duty Boots  
Ability: Regenerator  
EVs: 248 HP / 188 Atk / 56 SpD / 16 Spe  
Adamant Nature  
- Thunder Wave  
- Brave Bird  
- Sacred Fire  
- Whirlwind  

Groudon @ Leftovers  
Ability: Drought  
EVs: 252 HP / 136 Def / 104 SpD / 16 Spe  
Impish Nature  
- Stealth Rock  
- Precipice Blades  
- Toxic  
- Rock Tomb  

Marshadow @ Choice Band  
Ability: Technician  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Spectral Thief  
- Shadow Sneak  
- Ice Punch  
- Close Combat  

Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 48 HP / 4 Def / 204 SpD / 252 Spe  
Jolly Nature  
- Foul Play  
- Knock Off  
- Roost  
- U-turn  

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

Eternatus @ Black Sludge  
Ability: Pressure  
EVs: 252 HP / 112 SpD / 144 Spe  
Timid Nature  
- Dynamax Cannon  
- Light Screen  
- Recover  
- Dragon Tail