Blissey (F) @ Wiki Berry  
Ability: Innards Out  
EVs: 252 HP / 252 SpD / 252 Spe  
Gentle Nature  
IVs: 0 Atk / 0 Def  
- Magic Coat  
- Defog  
- Final Gambit  
- Taunt  

Mewtwo-Mega-X @ Focus Sash  
Ability: Pure Power  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Lonely Nature  
- Light That Burns the Sky  
- Let's Snuggle Forever  
- Menacing Moonraze Maelstrom  
- Sunsteel Strike  

Mewtwo-Mega-X @ Focus Sash  
Ability: Pure Power  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Photon Geyser  
- Sunsteel Strike  
- Storm Throw  
- Extreme Speed  

Mewtwo-Mega-X @ Focus Sash  
Ability: Magic Bounce  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Sunsteel Strike  
- Spectral Thief  
- Close Combat  
- Shell Smash  

Mewtwo-Mega-X @ Safety Goggles  
Ability: Innards Out  
EVs: 252 HP / 252 Atk / 252 SpA / 252 Spe  
Mild Nature  
IVs: 0 Def / 0 SpD  
- Moongeist Beam  
- Sunsteel Strike  
- Freeze-Dry  
- Shell Smash  

Regigigas @ Lum Berry  
Ability: Pure Power  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Fake Out  
- Extreme Speed  
- Sunsteel Strike  
- Spikes