Gengar-Mega @ Spooky Plate  
Ability: Teravolt  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Substitute  
- Judgment  
- Secret Sword  
- Shell Smash  

Groudon-Primal @ Lum Berry  
Ability: Turboblaze  
EVs: 248 HP / 252 Atk / 8 Def  
Adamant Nature  
- V-create  
- Thousand Arrows  
- Spikes  
- Sucker Punch  

Gyarados (F) @ Gyaradosite  
Ability: Wonder Guard  
Shiny: Yes  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Knock Off  
- Waterfall  
- Shell Smash  
- Taunt  

Diancie-Mega @ Pixie Plate  
Ability: Pixilate  
Shiny: Yes  
EVs: 252 Atk / 4 SpA / 252 Spe  
Hasty Nature  
- Fake Out  
- Extreme Speed  
- Boomburst  
- Toxic Spikes  

Deoxys-Speed @ Focus Sash  
Ability: No Guard  
EVs: 248 HP / 4 Def / 4 SpD / 252 Spe  
Jolly Nature  
IVs: 0 Atk  
- Sheer Cold  
- Gastro Acid  
- Stealth Rock  
- Taunt  

Mewtwo-Mega-X @ Lum Berry  
Ability: Huge Power  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Fusion Bolt  
- Sacred Fire  
- Gunk Shot  
- Close Combat