Queen Aleena, the ruler of the planet Mobius, is being overthrown by Dr. Robotnik and his army of robots. It is up to our heroes, Sonic, Sonia, and Manic, to search for their hidden mother and form the Council of Four.
|Character's name||Voice actor||MLP counterpart|
|Dr. Robotnik||Gary Chalk|
|Queen Alenna||Gail Webster||Princess Luna|
|Knuckles||Ian James Corlett||Applejack|
- Main article: List of Sonic Underground episodes
|Channel aired||Broadcast run|
|First-run syndication||August 30, 1999–August 27, 2000|
|October 3, 2010–September 25, 2011|
|June 11–September 13, December 2012|
As of January 1, 2021, the show is currently available on CBS All Access.
Home video timeline
|Title||Release date||List price|
|Dr. Robotnik's Revenge||July 22, 2003||
|Sonic Underground: Volume 1||December 18, 2007||
|Vol. 1: Queen Aleena Chronicles||December 18, 2007||
|Vol. 2: Sonic to the Rescue||February 19, 2008||$6.99|
|Sonic Underground: Volume 2||June 17, 2008||
|Vol. 3: Secrets of the Chaos Emerald||July 22, 2008||$6.99|
|Vol. 4: Ready, Aim, Sonic!||July 21, 2009||
|Vol. 5: Legend Has It||June 1, 2010||
|Vol. 6: Band on the Run||September 7, 2010||
Amazon Instant Video/iTunes
Since 2013, the complete series was released on iTunes and Amazon Instant Video.
- 65 episodes were planned, but only 40 of these episodes actually aired.
- Sonic still appears to be in his classic design in this cartoon. His modern-day design would later be used in Sonic X.