Diancie-Mega @ Pixie Plate  
Ability: Pixilate  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Hasty Nature  
- Fake Out  
- Extreme Speed  
- Boomburst  
- V-create  

Groudon @ Red Orb  
Ability: Intimidate  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- V-create  
- Defog  
- Morning Sun  
- Bolt Strike  

Mewtwo-Mega-Y @ Life Orb  
Ability: Magic Guard  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
- Light of Ruin  
- Mind Blown  
- Strength Sap  
- Photon Geyser  

Chansey (F) @ Choice Scarf  
Ability: Imposter  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Metal Burst  
- U-turn  
- Defog  
- Shore Up  

Giratina @ Griseous Orb  
Ability: Prankster  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Haze  
- Destiny Bond  
- Shore Up  
- Core Enforcer  

Arceus @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Shift Gear  
- Facade  
- Spore  
- Knock Off