Yveltal @ Heavy-Duty Boots  
Ability: Dark Aura  
EVs: 248 HP / 8 SpD / 252 Spe  
Jolly Nature  
IVs: 0 Atk  
- Foul Play  
- Taunt  
- Defog  
- Roost  

Necrozma-Dusk-Mane @ Leftovers  
Ability: Prism Armor  
EVs: 252 HP / 136 Def / 120 Spe  
Impish Nature  
- Dragon Dance  
- Sunsteel Strike  
- Earthquake  
- Moonlight  

Zekrom @ Life Orb  
Ability: Teravolt  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Scale Shot  
- Bolt Strike  
- Dragon Dance  
- Roost  

Groudon @ Leftovers  
Ability: Drought  
EVs: 248 HP / 116 Atk / 64 Def / 80 Spe  
Adamant Nature  
- Bulk Up  
- Precipice Blades  
- Stone Edge  
- Stealth Rock  

Eternatus @ Haban Berry  
Ability: Pressure  
EVs: 252 HP / 124 SpD / 132 Spe  
Timid Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Flamethrower  
- Toxic  
- Recover  

Ho-Oh @ Heavy-Duty Boots  
Ability: Regenerator  
EVs: 252 HP / 240 SpD / 16 Spe  
Careful Nature  
- Thunder Wave  
- Defog  
- Brave Bird  
- Sacred Fire