Steelix-Mega @ Steelixite  
Ability: Magic Bounce  
EVs: 252 HP / 4 Def / 252 SpD  
Careful Nature  
IVs: 0 Atk  
- Recover  
- Parting Shot  
- Toxic  
- Metal Burst  

Sableye-Mega @ Leftovers  
Ability: Wonder Guard  
EVs: 252 HP / 252 Def / 4 SpD  
Bold Nature  
IVs: 0 Atk  
- Magic Coat  
- Defog  
- Roost  
- Whirlwind  

Mewtwo-Mega-Y @ Choice Scarf  
Ability: Mold Breaker  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
- Psycho Boost  
- U-turn  
- Grass Knot  
- Moonblast  

Gyarados @ Gyaradosite  
Ability: Wonder Guard  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Shell Smash  
- Knock Off  
- Substitute  
- Taunt  

Mewtwo-Mega-X @ Choice Scarf  
Ability: Shadow Tag  
EVs: 120 HP / 252 Atk / 136 Spe  
Adamant Nature  
- Drain Punch  
- Precipice Blades  
- Bolt Strike  
- Gear Grind  

Chansey (F) @ Eviolite  
Ability: Imposter  
EVs: 248 HP / 252 Def / 8 SpD  
Relaxed Nature  
IVs: 0 Atk / 30 SpA / 0 Spe  
- Whirlwind  
- Chatter  
- Spikes  
- Wish