Groudon @ Heat Rock  
Ability: Drought  
EVs: 252 HP / 4 Atk / 252 Def  
Impish Nature  
- Precipice Blades  
- Stone Edge  
- Thunder Wave  
- Stealth Rock  

Zacian-Crowned @ Rusted Sword  
Ability: Intrepid Sword  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Behemoth Blade  
- Solar Blade  
- Wild Charge  
- Play Rough  

Calyrex-Shadow @ Choice Specs  
Ability: As One (Spectrier)  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Astral Barrage  
- Giga Drain  
- Psychic  
- Pollen Puff  

Ho-Oh @ Heavy-Duty Boots  
Ability: Pressure  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Sacred Fire  
- Brave Bird  
- Roost  
- Defog  

Necrozma-Dusk-Mane @ Life Orb  
Ability: Prism Armor  
EVs: 252 Atk / 4 SpA / 252 Spe  
Naive Nature  
- Dragon Dance  
- Photon Geyser  
- Earthquake  
- Heat Wave  

Xerneas @ Power Herb  
Ability: Fairy Aura  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Geomancy  
- Moonblast  
- Draining Kiss  
- Thunderbolt