The Ultimate Ninja is the son of the Ultimate Daimyo, the master of the Battle Nexus which is a tournament from the greatest warrior every three years to see who is the champion of the multiverse. The Ultimate Ninja makes his first appearance in "Ultimate Ninja." He came to Earth to challenge the Shredder but learned that the Shredder met his demise by Leonardo. So he challenged Leo to a duel and they fought to the death. However, the Ultimate Ninja fought with no honor and tried to kill Leo after duel was finished.

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