Grimmsnarl (M) @ Light Clay  
Ability: Prankster  
Tera Type: Dark  
EVs: 252 HP / 132 Def / 124 SpD  
Impish Nature  
IVs: 0 Atk  
- Light Screen  
- Reflect  
- Taunt  
- Parting Shot  

Arceus (Arceus-Ground) @ Earth Plate  
Ability: Multitype  
Tera Type: Water  
EVs: 160 HP / 176 Atk / 172 Spe  
Adamant Nature  
- Dragon Dance  
- Taunt  
- Earthquake  
- Waterfall  

Koraidon @ Life Orb  
Ability: Orichalcum Pulse  
Tera Type: Fire  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Dragon Claw  
- Swords Dance  
- Drain Punch  
- Flame Charge  

Miraidon @ Weakness Policy  
Ability: Hadron Engine  
Tera Type: Dragon  
EVs: 252 HP / 252 SpA / 4 Spe  
Modest Nature  
- Agility  
- Dragon Pulse  
- Electro Drift  
- Taunt  

Necrozma-Dusk-Mane @ Covert Cloak  
Ability: Prism Armor  
Tera Type: Psychic  
EVs: 252 HP / 204 Def / 52 Spe  
Impish Nature  
- Dragon Dance  
- Photon Geyser  
- Sunsteel Strike  
- Morning Sun  

Ditto @ Choice Scarf  
Ability: Imposter  
Tera Type: Ghost  
EVs: 248 HP / 8 Atk / 252 Def  
Impish Nature  
IVs: 30 Atk  
- Transform