Sonic Underground Season 2 Episode 13 Season 2, Episode 13

A self proclaimed scientist has come to Robotropolis with a device that will reverse the effects of Robotnik's robotisizer. Sonia, Manic and Sonia attend a demonstration of this new technology where Sonia decides she can use it to help her rescue a friend. Sonic, on the other hand, is skeptical that this machine is the real thing and decides to investigate. Robotnik kidnaps the inventor, and forces him to confess that he is a hoax. Robotnik will spare his life only if he agrees to use his machine as a robotisizer. Sonic learns of this deal and quickly rescues Sonia before she becomes Robotnik's next victim.