Regigigas @ Lum Berry  
Ability: Huge Power  
EVs: 248 HP / 252 Atk / 8 SpD  
Adamant Nature  
- Extreme Speed  
- Water Shuriken  
- Pursuit  
- Substitute  

Groudon-Primal @ Mental Herb  
Ability: Mold Breaker  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Thousand Arrows  
- Extreme Speed  
- Belly Drum  
- Recover  

Giratina @ Safety Goggles  
Ability: Prankster  
EVs: 248 HP / 252 Def / 8 SpD  
Bold Nature  
IVs: 0 Atk  
- Encore  
- Baton Pass  
- Curse  
- Roost  

Gengar-Mega @ Black Sludge  
Ability: Wonder Guard  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Substitute  
- Baton Pass  
- Shadow Ball  
- Toxic Spikes  

Gyarados @ Gyaradosite  
Ability: Wonder Guard  
EVs: 252 HP / 4 Def / 252 SpD  
Careful Nature  
- Aromatherapy  
- Defog  
- Recover  
- U-turn  

Blissey (M) @ Choice Scarf  
Ability: Imposter  
EVs: 252 HP / 4 Def / 252 SpD  
Sassy Nature  
IVs: 0 Atk / 30 SpA / 0 Spe  
- Whirlwind  
- Final Gambit  
- Trick  
- Wish