Blissey (F) @ Heavy-Duty Boots  
Ability: Natural Cure  
EVs: 252 HP / 252 Def / 4 SpD  
Bold Nature  
IVs: 0 Atk  
- Stealth Rock  
- Seismic Toss  
- Toxic  /  Aromatherapy
- Soft-Boiled

Clefable @ Leftovers  
Ability: Unaware  
EVs: 252 HP / 252 Def / 4 SpD  
Bold Nature  
IVs: 0 Atk  
- Calm Mind  
- Moonblast  
- Aromatherapy  /  Flamethrower
- Soft-Boiled

Toxapex @ Shed Shell
Ability: Regenerator  
EVs: 248 HP / 252 Def / 8 SpD  
Bold Nature  
IVs: 0 Atk  
- Light Screen
- Toxic  
- Knock Off  /  Haze
- Recover  

Gastrodon-East @ Heavy-Duty Boots  
Ability: Storm Drain  
EVs: 252 HP / 4 Def / 252 SpD  
Sassy Nature  
- Scald  
- Earthquake  
- Clear Smog  /  Toxic
- Recover  

Skarmory @ Rocky Helmet  
Ability: Sturdy  
EVs: 248 HP / 72 Def / 184 Spe  
Impish Nature  
IVs: 0 Atk  
- Spikes  
- Iron Defense 
- Body Press
- Roost

OR

Corviknight @ Shed Shell  
Ability: Pressure  
EVs: 252 HP / 252 Def / 4 SpD  
Impish Nature  
IVs: 0 Atk  
- Iron Defense  
- Body Press  
- Roost  
- Defog