Mewtwo-Mega-X @ Life Orb  
Ability: Tough Claws  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Close Combat  
- Ice Hammer  
- Spectral Thief  
- U-turn  

Xerneas @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Bold Nature  
IVs: 0 Atk  
- Quiver Dance  
- Moonblast  
- Discharge  
- Strength Sap  

Steelix-Mega @ Rocky Helmet  
Ability: Magic Bounce  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Anchor Shot  
- Volt Switch  
- Spiky Shield  
- Shore Up  

Gengar-Mega @ Spooky Plate  
Ability: Regenerator  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Judgment  
- Poison Fang  
- Rapid Spin  
- Secret Sword  

Zygarde-Complete @ Groundium Z  
Ability: Prankster  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Impish Nature  
- Thousand Waves  
- Recover  
- Entrainment  
- Haze  

Yveltal @ Assault Vest  
Ability: Regenerator  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Pursuit  
- Nuzzle  
- U-turn  
- Revelation Dance