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

Ho-Oh @ Heavy-Duty Boots  
Ability: Regenerator  
EVs: 252 HP / 4 Atk / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
Tera Type: Grass  
- Sacred Fire  
- Whirlwind  
- Defog  
- U-turn  

Greninja-Mega @ Choice Band  
Ability: Adaptability  
EVs: 4 HP / 252 Atk / 252 Spe  
Jolly Nature  
Tera Type: Poison  
- Ceaseless Edge  
- Knock Off  
- Crabhammer  
- Flip Turn  

Ampharos-Mega @ Leftovers  
Ability: Hadron Engine  
EVs: 252 HP / 252 SpA / 4 SpD  
Modest Nature  
Tera Type: Fairy  
- Electro Drift  
- Dragon Pulse  
- Thunderclap  
- Volt Switch  

Magearna-Mega @ Leftovers  
Ability: Prankster  
EVs: 252 HP / 4 Atk / 252 Def  
Impish Nature  
Tera Type: Water  
- Stealth Rock  
- Gigaton Hammer  
- Encore  
- Thunder Wave  

Arceus-Fighting @ Leftovers  
Ability: Regenerator  
EVs: 252 HP / 4 Def / 252 Spe  
Jolly Nature  
Tera Type: Ghost  
- No Retreat  
- Rage Fist  
- Low Kick  
- Taunt