1 Season
40 Episode
Sonic Underground - Season 1 Episode 29 New Echidna in Town (Chaos Emerald Crisis, Part 3)
Knuckles reluctantly makes a deal with Robotnik to turn over Sonic and his family in exchange for finding the Chaos Emerald that will save Mobius. Knuckles soon regrets that he ever trusted the evil dictator after Robotnik begins to follow through on his plans to roboticize the Hedgehogs.
- Year: 1999
- Country: France, United States of America
- Genre: Action & Adventure, Animation, Kids
- Studio: TF1, Syndication
- Keyword: musical, robot as menace, rebellion, triplet, based on video game, hedgehog, animal protagonist, band
- Director: Jean Chalopin, Robby London, Jean Cheville
- Cast: Jaleel White, Garry Chalk, Maurice LaMarche, Peter Wilds, Gail Webster, Ian James Corlett