Jesse joins the duel and summons Rainbow Dragon to help Jaden face the Sacred Beasts. At the end, Jaden learns that Marcel was only a puppet of a ghost from Jaden's past: A monster spirit named Yubel. Jaden reveals very little about Yubel to Jesse, but then Yubel reveals her ultimate monster. Jesse says he has to stay to keep the energy going so that the school can get back to their world but the crumbling stadium forces Axel, Blair, Marcel and Jaden to escape, with Jaden and Marcel unconscious. Yubel and Jesse then vanish. (thetvdb.com)