Bouffalant @ Assault Vest  
Ability: Soundproof  
EVs: 248 HP / 252 Atk / 8 SpD  
Adamant Nature  
- Return  
- Facade  
- Earthquake  
- Pursuit  

Bouffalant @ Choice Band  
Ability: Reckless  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Head Charge  
- Pursuit  
- Megahorn  
- Earthquake  

Bouffalant @ Leftovers  
Ability: Sap Sipper  
EVs: 252 HP / 132 Atk / 124 Spe  
Adamant Nature  
- Return  
- Earthquake  
- Substitute / Megahorn
- Toxic / Swords Dance

Additional Item Options: Buginium Z
Notes: Bouffalant is a fearsome Normal type that has the abilities, bulk, and power to prevail as a bulky offensive threat in ZU. Sap Sipper and Soundproof provide useful immunities for set up or trapping purposes while Reckless is the best ability to abuse its strongest STAB, Head Charge.