Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 96 HP / 252 Atk / 4 SpD / 156 Spe  
Jolly Nature  
- Stealth Rock  
- Swords Dance  
- Precipice Blades  
- Heat Crash  

Grimmsnarl (M) @ Light Clay  
Ability: Prankster  
Tera Type: Ghost  
EVs: 248 HP / 152 Def / 108 SpD  
Bold Nature  
IVs: 0 Atk  
- Light Screen  
- Reflect  
- Parting Shot  
- Taunt  

Zacian-Crowned @ Rusted Sword  
Ability: Intrepid Sword  
Tera Type: Fighting  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Play Rough  
- Close Combat  
- Wild Charge  
- Swords Dance  

Eternatus @ Power Herb  
Ability: Pressure  
Tera Type: Fairy  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Meteor Beam  
- Dynamax Cannon  
- Fire Blast  
- Recover  

Zygarde @ Leftovers  
Ability: Power Construct  
Tera Type: Ground  
EVs: 12 HP / 216 Atk / 48 SpD / 232 Spe  
Adamant Nature  
- Dragon Dance  
- Thousand Arrows  
- Substitute  
- Dragon Tail  

Mewtwo-Mega-Y @ Mewtwonite Y  
Ability: Unnerve  
EVs: 88 Def / 204 SpA / 216 Spe  
Timid Nature  
IVs: 0 Atk  
- Nasty Plot  
- Psystrike  
- Focus Blast  
- Ice Beam