Mewtwo-Mega-Y @ Fist Plate  
Ability: Protean  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Hasty Nature  
- Moongeist Beam  
- Sunsteel Strike  
- Ice Beam  
- Judgment  

Gyarados-Mega @ Shed Shell  
Ability: Wonder Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 24 Spe  
Sassy Nature  
- Pursuit  
- Roost  
- Parting Shot  
- Spikes  

Yveltal @ Shed Shell  
Ability: Magic Bounce  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Soft-Boiled  
- Defog  
- Anchor Shot  
- Spectral Thief  

Gengar-Mega @ Focus Sash  
Ability: No Guard  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Taunt  
- Toxic Spikes  
- Moongeist Beam  
- Fissure  

Mewtwo-Mega-X @ Flame Plate  
Ability: Huge Power  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Naughty Nature  
- Sunsteel Strike  
- Petal Blizzard  
- Ice Shard  
- Judgment  

Scizor-Mega @ Shed Shell  
Ability: Wonder Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Stealth Rock  
- U-turn  
- Milk Drink  
- Will-O-Wisp