Shedinja @ Protective Pads  
Ability: Sturdy  
EVs: 67 HP / 252 Atk / 67 Def / 67 SpD / 252 Spe  
Jolly Nature  
- Parting Shot  
- Ice Shard  
- Endeavor  
- Pain Split  

Regigigas @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Facade  
- Stealth Rock  
- Precipice Blades  
- U-turn  

Giratina @ Griseous Orb  
Ability: Magic Bounce  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Baton Pass  
- Spectral Thief  
- Entrainment  
- Recover  

Gyarados-Mega @ Choice Band  
Ability: Mold Breaker  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Pursuit  
- Knock Off  
- Crabhammer  
- Bolt Strike  

Xerneas @ Leftovers  
Ability: Pixilate  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Rash Nature  
- Rapid Spin  
- Strength Sap  
- Boomburst  
- Extreme Speed  

Venusaur-Mega @ Black Sludge  
Ability: Fur Coat  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD  
Modest Nature  
IVs: 0 Atk / 0 Spe  
- Milk Drink  
- Grass Knot  
- Anchor Shot  
- Core Enforcer