Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 248 HP / 8 Def / 252 SpD  
Sassy Nature  
- Stealth Rock  
- Earthquake  
- Overheat  
- Dragon Tail  

Zamazenta-Crowned @ Rusted Shield  
Ability: Dauntless Shield  
Tera Type: Water  
EVs: 8 HP / 252 Def / 248 Spe  
Bold Nature  
IVs: 0 Atk  
- Iron Defense  
- Body Press  
- Rest  
- Roar  

Blaziken-Mega (M) @ Blazikenite  
Ability: Speed Boost  
Tera Type: Fire  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Protect  
- Stone Edge  
- Low Kick  
- Flare Blitz  

Eternatus @ Power Herb  
Ability: Pressure  
Tera Type: Ghost  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Meteor Beam  
- Dynamax Cannon  
- Flamethrower  
- Recover  

Arceus @ Leftovers  
Ability: Multitype  
Tera Type: Fire  
EVs: 248 HP / 16 Atk / 120 SpD / 124 Spe  
Adamant Nature  
- Bulk Up  
- Taunt  
- Extreme Speed  
- Shadow Claw  

Yveltal @ Life Orb  
Ability: Dark Aura  
EVs: 4 Atk / 252 SpA / 252 Spe  
Naive Nature  
- Dark Pulse  
- Oblivion Wing  
- Sucker Punch  
- Defog