Alakazam-Mega @ Terrain Extender  
Ability: Psychic Surge  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
- Photon Geyser  
- Stealth Rock  
- Parting Shot  
- Recover  

Mewtwo-Mega-Y @ Insect Plate  
Ability: No Guard  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Photon Geyser  
- Fissure  
- Judgment  
- Shell Smash  

Mewtwo-Mega-X @ Fairy Memory  
Ability: Huge Power  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
IVs: 0 SpA  
- Thousand Arrows  
- Photon Geyser  
- Multi-Attack  
- Shell Smash  

Deoxys-Attack @ Focus Sash  
Ability: Magic Guard  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
- Mind Blown  
- Photon Geyser  
- Light of Ruin  
- Shell Smash  

Solgaleo @ Safety Goggles  
Ability: Prankster  
EVs: 252 HP / 252 Def / 252 SpD / 252 Spe  
Bold Nature  
IVs: 0 Atk / 0 Def / 0 SpA / 0 SpD  
- Destiny Bond  
- Haze  
- Spore  
- Recover  

Gyarados-Mega @ Darkinium Z  
Ability: Wonder Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD  
Relaxed Nature  
IVs: 30 HP / 0 Spe  
- Knock Off  
- Parting Shot  
- Heal Order  
- Defog