Groudon @ Red Orb  
Ability: Drought  
EVs: 248 HP / 112 Atk / 140 Def / 8 SpD  
Impish Nature  
- Precipice Blades  
- Stone Edge  
- Swords Dance  
- Stealth Rock  

Zacian-Crowned @ Rusted Sword  
Ability: Intrepid Sword  
Tera Type: Ground  
EVs: 252 Atk / 4 Def / 252 Spe  
Adamant Nature  
- Swords Dance  
- Behemoth Blade  
- Wild Charge  
- Tera Blast  

Eternatus @ Choice Specs  
Ability: Pressure  
Tera Type: Dragon  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Draco Meteor  
- Sludge Bomb  
- Fire Blast  

Ho-Oh @ Heavy-Duty Boots  
Ability: Regenerator  
Tera Type: Dark  
EVs: 248 HP / 176 Atk / 20 Def / 56 SpD / 8 Spe  
Adamant Nature  
- Sacred Fire  
- Brave Bird  
- Defog  
- Thunder Wave  

Zygarde @ Dragonium Z  
Ability: Power Construct  
Tera Type: Ground  
EVs: 4 HP / 252 Atk / 20 SpD / 232 Spe  
Jolly Nature  
- Dragon Dance  
- Thousand Arrows  
- Outrage  
- Substitute  

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