Gyarados-Mega @ Lum Berry  
Ability: Magic Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Pursuit  
- Beat Up  
- Toxic Spikes  
- Recover  

Slaking @ Leppa Berry  
Ability: Harvest  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Searing Sunraze Smash  
- Extreme Evoboost  
- Shore Up  
- Substitute  

Mewtwo-Mega-X @ Bug Memory  
Ability: Huge Power  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Adamant Nature  
- Photon Geyser  
- Play Rough  
- Multi-Attack  
- V-create  

Audino-Mega @ Darkinium Z  
Ability: Wonder Guard  
Level: 99  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Spectral Thief  
- Magic Coat  
- Roost  
- Parting Shot  

Zygarde-Complete @ Shed Shell  
Ability: Magic Bounce  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Rapid Spin  
- Roost  
- U-turn  
- Whirlwind  

Slowbro-Mega @ Shed Shell  
Ability: Wonder Guard  
EVs: 248 HP / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Parting Shot  
- Scald  
- Strength Sap  
- Defog