Ho-Oh @ Heavy-Duty Boots  
Ability: Regenerator  
EVs: 248 HP / 204 Def / 52 SpD / 4 Spe  
Impish Nature  
- Whirlwind  
- Sacred Fire  
- Brave Bird  
- Defog  

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

Necrozma-Dusk-Mane @ Leftovers  
Ability: Prism Armor  
EVs: 252 HP / 188 Def / 40 SpD / 28 Spe  
Impish Nature  
- Sunsteel Strike  
- Morning Sun  
- Earthquake  
- Dragon Dance  

Yveltal @ Life Orb  
Ability: Dark Aura  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Sucker Punch  
- Knock Off  
- Dual Wingbeat  
- Roost  

Eternatus @ Power Herb  
Ability: Pressure  
EVs: 252 HP / 40 SpD / 216 Spe  
Timid Nature  
IVs: 0 Atk  
- Dragon Pulse  
- Meteor Beam  
- Cosmic Power  
- Recover  

Kyogre @ Leftovers  
Ability: Drizzle  
EVs: 252 HP / 252 Def / 4 Spe  
Bold Nature  
IVs: 0 Atk  
- Calm Mind  
- Rest  
- Scald  
- Thunder