Rayquaza-Mega @ Life Orb  
Ability: Aerilate  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Lonely Nature  
- Fake Out  
- Bonemerang  
- Boomburst  
- Extreme Speed  

Muk-Alola @ Safety Goggles  
Ability: Unaware  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Careful Nature  
- Spectral Thief  
- Nuzzle  
- Roost  
- Clear Smog  

Slowbro-Mega @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Spectral Thief  
- Spiky Shield  
- Psystrike  
- U-turn  

Yveltal @ Safety Goggles  
Ability: Prankster  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Bold Nature  
IVs: 0 Atk  
- Revelation Dance  
- Haze  
- Strength Sap  
- Recover  

Audino-Mega @ Safety Goggles  
Ability: Soundproof  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- U-turn  
- Spore  
- Defog  
- Shore Up  

Mewtwo-Mega-Y @ Magnet  
Ability: Simple  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Tail Glow  
- Thunderbolt  
- Lovely Kiss  
- Photon Geyser