Numbuh 9 (Maurice) was known as an incredibly powerful member of the KND, who defeated many of they're enemies and never lost to any of them. He became a mentor for many other KND operatives.
After his 13th birthday, he betrayed the KND and became an admiral of The Teen Ninjas. Not wanting to leave the KND but was corrupted by the Teen Ninjas after the KND decommissioned him. He becomes the third teenager to avoid being decommissioned after his girlfriend Cree Lincoln, and Chad Dickson.