Porcupine

Porcupine was first seen in the episode Ready to Rumble. He was a wrestler along side his brother Gaterboy. They fought to save their mother and, they won all of their matches until Ben showed up and defeated them with Four Arms. But in the end Ben helped them save their mother and gave them the prize money so they could save their farm.

Ben 10

 * Ready to Rumble (first appearance)

Trivia

 * It is unknown what species his father is, as he resembles a porcupine, and Gaterboy resembles an alligator (yet their mother is human).