Cresselia @ Assault Vest  
Ability: Regenerator  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 108 Spe  
Sassy Nature  
- U-turn  
- Core Enforcer  
- Spectral Thief  
- Knock Off  

Giratina @ Leftovers  
Ability: Misty Surge  
EVs: 248 HP / 252 Def / 252 SpA / 252 SpD  
Calm Nature  
IVs: 0 Atk / 24 Spe  
- Core Enforcer  
- Topsy-Turvy  
- Shore Up  
- Stealth Rock  

Registeel @ Safety Goggles  
Ability: Prankster / Icium Z
Level: 100 / 99
EVs: 248 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Haze  
- Purify  
- Heal Order  
- U-turn  

Chansey @ Eviolite  
Ability: Imposter  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Fake Out  
- Wish  
- Spikes  
- Parting Shot  

Diancie-Mega @ Earth Plate  
Ability: Pixilate  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Naive Nature  
- Boomburst  
- Extreme Speed  
- Rapid Spin  
- Judgment  

Gyarados-Mega @ Choice Band  
Ability: Magic Bounce  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Pursuit  
- Trick  
- Knock Off  
- Sunsteel Strike