Mewtwo-Mega-Y @ Choice Specs  
Ability: Psychic Surge  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Expanding Force  
- Photon Geyser  
- Volt Switch  
- Secret Sword  

Xerneas @ Metronome  
Ability: Pixilate  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Boomburst  
- Rapid Spin  
- Strength Sap  
- Scorching Sands  

Dialga @ Leftovers  
Ability: Ice Scales  
Level: 99  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 4 Spe  
Sassy Nature  
IVs: 0 Spe  
- Shore Up  
- Core Enforcer  
- Spectral Thief  
- Spikes  

Oh-Ho (Ho-Oh) @ Heavy-Duty Boots  
Ability: Magic Bounce  
Level: 99  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Knock Off  
- Shore Up  
- Spectral Thief  
- Anchor Shot  

Purple Frog (Swampert-Mega) @ Toxic Orb  
Ability: Poison Heal  
Shiny: Yes  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Brave Nature  
IVs: 0 Spe  
- Baneful Bunker  
- Court Change  
- Thousand Waves  
- Flip Turn  

Zygarde-Complete @ Rocky Helmet  
Ability: Fur Coat  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Thousand Waves  
- Volt Switch  
- Spectral Thief  
- Shore Up