Aerodactyl-Mega @ Choice Band  
Ability: Sand Stream  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Jolly Nature  
- Brave Bird  
- Diamond Storm  
- Thousand Arrows  
- U-turn  

Swampert-Mega @ Shed Shell  
Ability: Wonder Guard  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Careful Nature  
- U-turn  
- Defog  
- Aromatherapy  
- Whirlwind  

Metagross-Mega @ Shed Shell  
Ability: Huge Power  
Shiny: Yes  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Jolly Nature  
- Sacred Fire  
- Diamond Storm  
- Knock Off  
- Gear Grind  

Diancie-Mega @ Focus Sash  
Ability: Huge Power  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Jolly Nature  
- Leaf Blade  
- Play Rough  
- Thousand Arrows  
- Close Combat  

Scizor-Mega @ Focus Sash  
Ability: Wonder Guard  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
- Substitute  
- Shell Smash  
- Baton Pass  
- Gastro Acid  

Groudon-Primal @ Lum Berry  
Ability: Mold Breaker  
Shiny: Yes  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Adamant Nature  
- Shell Smash  
- Thousand Arrows  
- V-create  
- Spore