Ninja Bots are of Gallifreyan origin. However, Black Venom later reprogrammed most of them. Few remain that are still good, one of whom is NBB3:50. They have some of the same technology as Super Battle Droids, in addition to stun guns and the ability to freeze opponents...and time. They speed up time for themselves in order to move very quickly. The blueprints used in the creation of the Ninja Bot were used in the design of Shadja, according to the Gallifrey Experiment Theory.