Mewtwo-Mega-X @ Expert Belt  
Ability: Technician  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Hasty Nature  
- Storm Throw  
- Mach Punch  
- Frost Breath  
- Bonemerang  

Ho-Oh @ Heavy-Duty Boots  
Ability: Magic Bounce  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Bold Nature  
- Quiver Dance  
- Oblivion Wing  
- Spectral Thief  
- Lava Plume  

Zacian @ Rusted Sword  
Ability: Stall  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Sunsteel Strike  
- Grav Apple  
- Play Rough  
- Fishious Rend  

Heatran @ Leftovers  
Ability: Water Absorb  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Sassy Nature  
- Anchor Shot  
- Spectral Thief  
- Flip Turn  
- Recover  

Arceus-Ghost @ Spooky Plate  
Ability: Prankster  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Judgment  
- Heal Order  
- Haze  
- Entrainment  

Eternatus @ Black Sludge  
Ability: Fur Coat  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Bold Nature  
IVs: 0 Atk  
- Sludge Bomb  
- Core Enforcer  
- Milk Drink  
- Court Change