Gyarados-Mega @ Lum Berry  
Ability: Huge Power  
EVs: 248 HP / 252 Atk / 8 SpD  
Adamant Nature  
- Pursuit  
- Sucker Punch  
- Water Shuriken  
- Beat Up  

Mewtwo-Mega-X @ Choice Band  
Ability: Shadow Tag  
EVs: 64 Atk / 192 Def / 252 Spe  
Jolly Nature  
- Ice Punch  
- Low Kick  
- Dragon Ascent  
- Gunk Shot  

Manectric-Mega @ Leftovers  
Ability: Wonder Guard  
EVs: 248 HP / 8 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Substitute  
- Baton Pass  
- Taunt  
- Chatter  

Swampert-Mega @ Safety Goggles  
Ability: Wonder Guard  
EVs: 248 HP / 252 Def / 8 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Parting Shot  
- Roost  
- Defog  
- Magic Coat  

Rayquaza-Mega @ Sky Plate  
Ability: Mold Breaker  
EVs: 196 HP / 252 SpA / 60 Spe  
Modest Nature  
IVs: 0 Atk  
- Quiver Dance  
- Taunt  
- Oblivion Wing  
- Substitute  

Rayquaza-Mega @ Mental Herb  
Ability: Mold Breaker  
EVs: 64 HP / 252 SpA / 192 Spe  
Modest Nature  
IVs: 0 Atk  
- Shell Smash  
- King's Shield  
- Oblivion Wing  
- Earth Power