Swampert-Mega @ Covert Cloak  
Ability: Ice Scales  
Tera Type: Water  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Victory Dance  
- Wave Crash  
- Precipice Blades  
- Jungle Healing  

Ho-Oh @ Heavy-Duty Boots  
Ability: Desolate Land  
Tera Type: Fire  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Tidy Up  
- V-create  
- Dragon Ascent  
- Strength Sap  

Blacephalon @ Life Orb  
Ability: Magic Guard  
Tera Type: Fire  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Naive Nature  
- Astral Barrage  
- V-create  
- Electro Drift  
- High Jump Kick  

Yveltal @ Assault Vest  
Ability: Regenerator  
Tera Type: Dark  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- U-turn  
- Wicked Blow  
- Sucker Punch  
- Nuzzle  

Arceus-Poison @ Earth Plate  
Ability: Fur Coat  
Tera Type: Poison  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
- Calm Mind  
- Judgment  
- Mortal Spin  
- Soft-Boiled  

Diancie-Mega @ Choice Specs  
Ability: Pixilate  
Tera Type: Rock  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Hasty Nature  
- Boomburst  
- Revelation Dance  
- Volt Switch  
- Extreme Speed