William Dunbar

William Dunbar joined Code Lyoko in the second season as one of Yumi's classmates. In Final Round, he became the sixth member of Team Lyoko, until his first trip into Lyoko, when X.A.N.A. possessed him and used him as his general until episode Down to Earth where he was freed and returned as an ally. He returns in Code Lyoko Evolution, and permanently joins the team at the end of the episode Rivalry.