Ditto @ Choice Scarf  
Ability: Imposter  
EVs: 248 HP / 8 Atk / 252 Def  
Impish Nature  
IVs: 30 Atk  
- Transform  

Slowbro @ Rocky Helmet or Slowbronite
Ability: Regenerator  
EVs: 252 HP / 252 Def / 4 SpA  
Bold Nature  
IVs: 0 Atk  
- Slack Off  
- Scald  
- Toxic  
- Psyshock  

Chansey (F) @ Eviolite  
Ability: Natural Cure  
EVs: 248 HP / 252 Def / 8 SpD  
Bold Nature  
IVs: 0 Atk  
- Soft-Boiled  
- Seismic Toss  
- Toxic  
- Stealth Rock  

Corviknight @ Heavy-Duty Boots  
Ability: Pressure  
EVs: 252 HP / 24 Def / 232 SpD  
Careful Nature  
IVs: 0 Atk  
- Iron Defense  
- Body Press  
- Roost  
- Defog  

Gliscor @ Toxic Orb  
Ability: Poison Heal  
EVs: 244 HP / 88 SpD / 176 Spe  
Jolly Nature  
- Swords Dance  
- Earthquake  
- Facade  
- Roost  

Zapdos @ Heavy-Duty Boots  
Ability: Pressure  
EVs: 252 HP / 240 Def / 16 Spe  
Bold Nature  
IVs: 0 Atk  
- Substitute  
- Discharge  
- Toxic  
- Roost