Diancie-Mega @ Choice Band  
Ability: Huge Power  
EVs: 52 HP / 252 Atk / 204 Spe  
Adamant Nature  
- Extreme Speed  
- Water Shuriken  
- Pursuit  
- Beat Up  

Arceus @ Spooky Plate  
Ability: Mold Breaker  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Fusion Flare  
- Tail Glow  
- Boomburst  
- Judgment  

Giratina @ Leftovers  
Ability: Magic Bounce  
EVs: 248 HP / 100 Def / 160 Spe  
Timid Nature  
IVs: 0 Atk  
- Substitute  
- Baton Pass  
- Curse  
- Roost  

Xerneas @ Leftovers  
Ability: Wonder Guard  
EVs: 4 Def / 252 SpA / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Stealth Rock  
- Substitute  
- Moonblast  
- Baton Pass  

Suicune @ Safety Goggles  
Ability: Wonder Guard  
EVs: 252 HP / 252 Def / 4 SpD  
Bold Nature  
IVs: 0 Atk  
- Defog  
- Aromatherapy  
- Scald  
- Recover  

Blissey (F) @ Pixie Plate  
Ability: Imposter  
EVs: 252 HP / 252 Def / 4 SpD  
Bold Nature  
IVs: 0 Atk  
- Sleep Talk  
- Whirlwind  
- Chatter  
- Soft-Boiled