Arceus-Water @ Leftovers  
Ability: Liquid Voice  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Boomburst  
- Ice Beam  
- Thunderbolt  
- Nasty Plot  

Regigigas @ Life Orb  
Ability: Adaptability  
EVs: 4 HP / 252 Atk / 252 Spe  
Adamant Nature  
- Extreme Speed  
- Double-Edge  
- Knock Off  
- Swords Dance  

Miraidon @ Choice Scarf  
Ability: Hadron Engine  
Tera Type: Electric  
EVs: 4 HP / 252 SpA / 252 Spe  
Timid Nature  
- Electro Drift  
- Volt Switch  
- Draco Meteor  
- Overheat  

Floette-Mega @ Pixie Plate  
Ability: Triage  
Tera Type: Poison  
EVs: 240 HP / 252 SpA / 16 Spe  
Modest Nature  
IVs: 0 Atk  
- Draining Kiss  
- Earth Power  
- Calm Mind  
- Substitute  

Chesnaught-Mega @ Toxic Orb  
Ability: Poison Heal  
Tera Type: Ghost  
EVs: 252 HP / 252 Def / 4 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Body Press  
- Spikes  
- U-turn  
- Spiky Shield  

Ho-Oh @ Heavy-Duty Boots  
Ability: Regenerator  
Tera Type: Steel  
EVs: 248 HP / 8 Def / 252 SpD  
Careful Nature  
- Sacred Fire  
- U-turn  
- Defog  
- Roost