Diancie-Mega @ Lum Berry  
Ability: Pixilate  
EVs: 248 HP / 252 Atk / 4 Def / 4 SpA  
Brave Nature  
IVs: 0 Atk  
- Fake Out  
- Extreme Speed  
- Boomburst  
- Stealth Rock  

Registeel @ Shed Shell  
Ability: Magic Bounce  
EVs: 252 HP / 4 Def / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Recover  
- Defog  
- Stealth Rock  
- U-turn  

Giratina @ Safety Goggles  
Ability: Prankster  
EVs: 248 HP / 252 Def / 8 SpD  
Bold Nature  
IVs: 0 Atk  
- Destiny Bond  
- Encore  
- Curse  
- Recover  

Rayquaza-Mega @ Sky Plate  
Ability: Mold Breaker  
EVs: 64 HP / 252 SpA / 192 Spe  
Modest Nature  
IVs: 0 Atk  
- Dark Void  
- Shell Smash  
- Substitute  
- Oblivion Wing  

Gengar-Mega @ Spooky Plate  
Ability: Wonder Guard  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Shell Smash  
- Judgment  
- Sludge Bomb  
- Secret Sword  

Kyogre-Primal @ Lum Berry  
Ability: Wonder Guard  
EVs: 56 HP / 4 Def / 252 SpA / 196 Spe  
Modest Nature  
IVs: 0 Atk  
- Steam Eruption  
- Ice Beam  
- Quiver Dance  
- Recover