King Jackson Crabgrass is one of the main characters of Disney's KunoichiShow!. His mother Lady Staci Crabgrass was The Kunoichi of Ninchantiss before his cousin Princess Kittie McFist who happens to be a Junior Disney Princess. He was upgraded to The King instead of The Prince of Ninchantiss so he can become the Yellow Ninja by The Royal Ninja Council. Jack is voiced by Brennan Mejia who played Tyler Navarro, The Red Ranger from power Rangers Dino Charge and Power_Rangers_Dino_Super Charge . His singing voice is provided by Scott Grimes, who currently voices Steve Smith from TBS' American Dad!