Gyarados @ Light Clay  
Ability: Intimidate   
EVs: 252 HP / 252 Def  
Impish Nature  
IVs: 31 Hp / 31 Def / 31 Spe  
- Reflect  

Suicune @ Choice Specs  
Ability: Pressure  
EVs: 6 HP / 212 Def / 252 SpA / 4 Spe  
Bold Nature
IVs: 31 Hp / 31 Def / 31 SpA
- Hydro Pump

Ferrothorn @ Choice Band  
Ability: Iron Barbs  
EVs: 252 HP / 4 Atk / 252 Def  
Relaxed / Bold / Impish Nature  
IVs: 31 Hp / 31 Atk / 31 Def / any Spe
- Gyro Ball  

Sableye @ Jaboca Berry  
Ability: Prankster  
EVs: 200 HP / 252 Def  
+Def Nature
IVs: 31 Hp / 31 Def
- Tickle  

Gallade (M) @ Psychic Gem  
Ability: Sharpness   
EVs: 252 Atk / 252 Spe  
Adamant / Naughty Nature  
IVs: 31 Atk / 31 Spe (HP & Def IVs lower risk of crit OHKO but not needed)
- Psycho Cut  

Excadrill @ Ground Gem  
Ability: Sand Force  
Tera Type: Ground  
EVs: 6 HP / 252 Atk / 252 Spe  
Adamant Nature  
IVs: 31 Atk / 31 Spe
- Earthquake