Giratina @ Leftovers  
Ability: Prankster  
EVs: 248 HP / 252 Def / 8 Spe  
Bold Nature  
IVs: 0 Atk  
- Curse  
- Recover  
- Encore  
- Substitute  

Arceus @ Shed Shell  
Ability: Wonder Guard  
EVs: 248 HP / 252 Def / 8 SpD  
Bold Nature  
IVs: 0 Atk / 30 Spe  
- Milk Drink  
- Stealth Rock  
- Defog  
- Whirlwind  

Venusaur-Mega @ Shed Shell  
Ability: Magic Bounce  
EVs: 248 HP / 252 Def / 8 SpD  
Bold Nature  
IVs: 0 Atk  
- Toxic  
- Haze  
- Roost  
- Heal Bell  

Aerodactyl-Mega @ Choice Band  
Ability: Mold Breaker  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Dragon Ascent  
- Sacred Fire  
- Diamond Storm  
- U-turn  

Yveltal @ Safety Goggles  
Ability: Prankster  
EVs: 248 HP / 252 SpD / 8 Spe  
Careful Nature  
- Knock Off  
- Spore  
- Roost  
- Topsy-Turvy  

Xerneas @ Shed Shell  
Ability: Wonder Guard  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Shell Smash  
- Moonblast  
- Baton Pass  
- Magic Coat