Diancie-Mega @ Choice Specs  
Ability: Pixilate  
Shiny: Yes  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Rash Nature  
- Boomburst  
- Volt Switch  
- Secret Sword  
- Extreme Speed  

Groudon @ Red Orb  
Ability: Electric Surge  
Shiny: Yes  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Careful Nature  
- Recover  
- V-create  
- Anchor Shot  
- Bolt Strike  

Chansey @ Choice Scarf  
Ability: Imposter  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Impish Nature  
- Fake Out  
- Anchor Shot  
- Soft-Boiled  
- Trick  

Giratina @ Leftovers  
Ability: Magic Bounce  
Level: 99  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- U-turn  
- Core Enforcer  
- Haze  
- Shore Up  

Dialga @ Assault Vest  
Ability: Regenerator  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Sassy Nature  
IVs: 0 Atk / 0 Spe  
- Volt Switch  
- Revelation Dance  
- Core Enforcer  
- Rapid Spin  

Mewtwo-Mega-X @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Jolly Nature  
- Stealth Rock  
- Low Kick  
- Will-O-Wisp  
- Icicle Crash