Gyuudon  

Vongola Lightning Bull

The Vongola Lightning Bull is a powerful weapon in the form of an armored bull that can produce electricity. It was first introduced during a heated confrontation between Lambo and Gokudera, when Lambo ordered it to attack Gokudera. Like all animals owned by the Vongola family, the Lightning Bull bears a crest on its forehead. The term "gyuudon" refers to a beef dish served in a bowl.