Aegislash @ Leftovers  
Ability: Magic Bounce  
EVs: 248 HP / 80 SpD / 180 Spe  
Calm Nature  
IVs: 0 Atk  
- Milk Drink  
- Spikes  
- Baton Pass  
- Curse  

Gengar-Mega @ Black Sludge  
Ability: No Guard  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Substitute  
- Baton Pass  
- Sheer Cold  
- Sludge Bomb  

Sableye-Mega @ Flame Orb  
Ability: Wonder Guard  
EVs: 248 HP / 8 Def / 252 SpD  
Calm Nature  
IVs: 0 Atk  
- Parting Shot  
- Psycho Shift  
- Roost  
- Defog  

Gyarados-Mega @ Lum Berry  
Ability: Huge Power  
EVs: 248 HP / 252 Atk / 8 SpD  
Adamant Nature  
- Water Shuriken  
- Knock Off  
- Pursuit  
- Ice Shard  

Rayquaza-Mega @ Sky Plate  
Ability: Turboblaze  
EVs: 64 HP / 252 SpA / 192 Spe  
Modest Nature  
IVs: 0 Atk  
- Oblivion Wing  
- Substitute  
- Quiver Dance  
- Dark Void  

Xerneas @ Safety Goggles  
Ability: Wonder Guard  
EVs: 248 HP / 8 SpA / 252 SpD  
Sassy Nature  
IVs: 0 Atk / 0 Spe  
- Parting Shot  
- Moonblast  
- Aromatherapy  
- Roost