Garchomp-Mega @ Choice Band  
Ability: Mold Breaker  
EVs: 252 Atk / 4 Def / 252 Spe  
Adamant Nature  
- Precipice Blades  
- Thousand Arrows  
- Pursuit  
- Stealth Rock  

Kyurem-Black @ Lum Berry  
Ability: Refrigerate  
EVs: 252 HP / 252 Atk / 4 Spe  
Adamant Nature  
- Extreme Speed  
- Sacred Fire  
- King's Shield  
- Shell Smash  

Aegislash @ Rocky Helmet  
Ability: Flash Fire  
EVs: 252 HP / 72 Def / 184 SpD  
Sassy Nature  
IVs: 0 Atk / 0 Spe  
- Topsy-Turvy  
- Will-O-Wisp  
- Defog  
- Recover  

Mewtwo-Mega-X @ Expert Belt  
Ability: Magic Bounce  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Close Combat  
- Sacred Fire  
- Sucker Punch  
- Knock Off  

Gyarados-Mega @ Toxic Orb  
Ability: Poison Heal  
EVs: 216 HP / 144 Atk / 104 Def / 44 Spe  
Adamant Nature  
- Crabhammer  
- Knock Off  
- Will-O-Wisp  
- Shift Gear  

Giratina @ Toxic Orb  
Ability: Poison Heal  
EVs: 240 HP / 172 Def / 96 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Spiky Shield  
- Dragon Tail  
- Recover  
- U-turn