Dialga @ Terrain Extender  
Ability: Misty Surge  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Spectral Thief  
- Baton Pass  
- Strength Sap  
- Defog  

Mewtwo-Mega-X @ Focus Sash  
Ability: Magic Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Pursuit  
- Light That Burns the Sky  
- Sunsteel Strike  
- Spectral Thief  

Kartana @ Focus Sash  
Ability: Parental Bond  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Shell Smash  
- Sunsteel Strike  
- Fire Lash  
- Taunt  

Kyogre-Primal @ Zap Plate  
Ability: Wonder Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Rash Nature  
- Shell Smash  
- Sunsteel Strike  
- Judgment  
- Steam Eruption  

Mewtwo-Mega-X @ Focus Sash  
Ability: Magic Bounce  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Hasty Nature  
- Photon Geyser  
- Menacing Moonraze Maelstrom  
- Shell Smash  
- Close Combat  

Pheromosa @ Focus Sash  
Ability: Huge Power  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- U-turn  
- Sunsteel Strike  
- Stealth Rock  
- Bolt Strike