Currently available on 1 streaming service.

Sonic Underground - watch online: stream, buy or rent

Currently you are able to watch "Sonic Underground" streaming on Hoopla for free.

Cast

Jaleel White
Sonic / Manic / Sonia (voice)
Garry Chalk
Dr. Robotnik (voice)
Maurice LaMarche
Sleet (voice)
Peter Wilds
Dingo (voice)
Gail Webster
Queen Aleena (voice)
Ian James Corlett
Cyrus (voice)
Sam Vincent
Sonic (singing voice)
Tyley Ross
Manic (singing voice)
Stevie Vallance
Sonia (singing voice)