Supah Ninjas is an American action-comedy superhero series, created by Leo Chu and Eric Garcia. The series premiered as a special preview on Nickelodeonon January 17, 2011 in the United States and started airing regularly on April 16, 2011. On March 15, 2012, it was the announced that the series was renewed for a second season. The second season premiered on February 9, 2013, after a new episode of Marvin Marvin. It was announced on May 7, 2013 that the show will be canceled.
The series revolves around Mike Fukanaga and his friends, Owen Reynolds and Amanda McKay. After the death of his grandfather, Mike is given a mysterious letter which leads him to discover that he comes from a long line of vigilante ninjas. With Owen, and later Amanda, they are ushered into the world of crime-fighting, forming the team "Supah Ninjas." They are trained with a hologram of Mike's grandfather, whom Owen refers to as "Hologramps" in Empire City.
- Ryan Potter as Mike Fukanaga. He is Japanese-American. Mike is quiet and shy, having never quite realized his potential. In the pilot, it is said that he is part of a Star Wars fan club. He discovers a secret underground dojo under his bed, where a hologram of his late grandfather awaits to train him in the ways of the ninja. Mike discovers he is the latest in a long family line of ninjas, and ultimately learns about leadership, friendship, and romance while saving Empire City from villains. As said by Hologramps, his reflexes make him incredibly versatile and adaptive. His weapons are a pair of nunchucks and his necklace is a disguised shuriken. Mike also seems to show feelings for his friend Amanda.
- Carlos Knight as Owen Reynolds, Mike's best friend, fellow-Supah Ninja. He is of African American descent. A bit eccentric, Owen has a tendency to overreact, but is a powerful warrior nonetheless and wise-cracking. Owen enjoys food a lot, even eating whenever the trio have big problems to deal with. Owen is known to be lazy at times. He is the only character to call Grandpa Fukunaga "Hologramps". As said by Hologramps, his instincts make him fearless. His weapon is a Bō staff. He's always trying to impress girls, especially Kelly (Amanda's best friend).
- Gracie Dzienny as Amanda McKay. She is a cheerleader, and when she is kidnapped by The Rhymer, the Supah Ninjas come to her rescue. When she discovers who her rescuers are, she requests to join them threatening to tell everyone about Owen and Mike, and thus becomes the third member of the group. Her family is wealthy, and are the owners of McKay Casinos. In the episode "Katara", she kissed Mike to distract Katara. In the episode, 'Quake', she starts having feelings for Mike, and constantly shows signs of being jealous of him and Julie. As said by Hologramps, she is distinctive from the rest of the group due to her methodical nature. Her weapons are a pair of tonfa.
- Travis Wong and Jake Huang alternate as actors within the Yamato suit and Matthew Yang King (as Matt Yang King) voices Yamato, the X-39-P Fighting Robot trainer that helps the ninjas become better as a practice opponent at the dojo. Yamato usually wins against the ninjas in training. He has a very smart-mouth which he uses often.
- George Takei as Grandpa "Hologramps" Fukunaga, the sensei of the Supah Ninjas and Mike's deceased grandfather. A hologram carrying the family ninja legacy, he guides and trains the Supah Ninjas and in an underground high-tech dojo under Mike and Martin's home and uses a robot to guide them to fight. At the end of "Subsiders" he is seen watching the ninjas play in Mike's room and talking to Yamato. It then seems he is hiding something huge from the ninjas. It is unknown whether the secret he's hiding is about the Ishinas or something else.