Mewtwo-Mega-Y @ Choice Scarf  
Ability: Parental Bond  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
- Photon Geyser  
- Moongeist Beam  
- Searing Shot  
- Moonblast  

Mewtwo-Mega-Y @ Terrain Extender  
Ability: Psychic Surge  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
- Photon Geyser  
- Light That Burns the Sky  
- Spore  
- Menacing Moonraze Maelstrom  

Blissey (F) @ Safety Goggles  
Ability: Innards Out  
EVs: 252 HP / 252 Atk / 252 SpD  
Gentle Nature  
IVs: 0 Def / 0 Spe  
- Spectral Thief  
- Toxic Spikes  
- Parting Shot  
- Recover  

Gengar-Mega @ Leppa Berry  
Ability: Harvest  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Naive Nature  
- Menacing Moonraze Maelstrom  
- Light That Burns the Sky  
- Extreme Evoboost  
- Malicious Moonsault  

Mewtwo-Mega-X @ Life Orb  
Ability: Magic Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Adamant Nature  
- Megahorn  
- Photon Geyser  
- Light That Burns the Sky  
- Shell Smash  

Muk-Alola @ Psychium Z  
Ability: Wonder Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Beat Up  
- Parting Shot  
- Magic Coat  
- Heal Order