Ho-Oh @ Heavy-Duty Boots  
Ability: Regenerator  
Tera Type: Fairy  
EVs: 248 HP / 252 Def / 8 SpD  
Impish Nature  
- Sacred Fire  
- Brave Bird  
- Whirlwind  
- Recover  

Giratina-Origin @ Griseous Core  
Ability: Levitate  
Tera Type: Steel  
EVs: 248 HP / 112 Def / 104 SpA / 44 Spe  
Modest Nature  
- Hex  
- Draco Meteor  
- Thunder Wave  
- Defog  

Necrozma-Dusk-Mane @ Heavy-Duty Boots  
Ability: Prism Armor  
Tera Type: Fire  
EVs: 252 HP / 204 Def / 52 Spe  
Impish Nature  
- Dragon Dance  
- Sunsteel Strike  
- Knock Off  
- Morning Sun  

Koraidon @ Choice Scarf  
Ability: Orichalcum Pulse  
Tera Type: Ghost  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Low Kick  
- Outrage  
- U-turn  
- Flare Blitz  

Arceus-Ground @ Earth Plate  
Ability: Multitype  
Tera Type: Steel  
EVs: 252 HP / 252 SpA / 4 SpD  
Modest Nature  
IVs: 0 Atk  
- Judgment  
- Ice Beam  
- Stealth Rock  
- Recover  

Eternatus @ Leftovers  
Ability: Pressure  
Tera Type: Poison  
EVs: 80 HP / 252 SpD / 176 Spe  
Timid Nature  
- Dynamax Cannon  
- Recover  
- Sludge Bomb  
- Flamethrower