"Healer" is the thirty-third episode of the Sonic Underground television series. It first aired on 28 April 1999 in France and on 13 October 1999 in the United States. It was included in Volume 2.
A self proclaimed scientist named Titus has come to Robotropolis with a device dubbed the De-Roboticizer that will reverse the effects of Robotnik's roboticizer. 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 roboticizer. Sonic learns of this deal and quickly rescues Sonia before she becomes Robotnik's next victim.