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Sonic and his royal siblings seek to find their mother and defeat the tyrant, Robotnik.




2000   1999  



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Series cast summary:
 Additional Voices / ... (40 episodes, 1999-2000)
 Dr. Robotnik (40 episodes, 1999-2000)
Gail Webster ...
 Queen Aleena (40 episodes, 1999-2000)
Peter Wilds ...
 Dingo (40 episodes, 1999-2000)
 Sonic (40 episodes, 1999-2000)
Stevie Vallance ...
 Sonia / ... (40 episodes, 1999-2000)
Tyley Ross ...
 Manic (40 episodes, 1999-2000)
(40 episodes, 1999-2000)
Matt Hill ...
 Additional Voices / ... (40 episodes, 1999-2000)
 Additional Voices (40 episodes, 1999-2000)
Cusse Mankuma ...
 Additional Voices (40 episodes, 1999-2000)
Tabitha St. Germain ...
 Additional Voices (40 episodes, 1999-2000)
 Manic / ... (40 episodes, 1999-2000)
 Additional Voices / ... (40 episodes, 1999-2000)
Merrilyn Gann
(40 episodes, 1999-2000)
(40 episodes, 1999-2000)
 Additional Voices / ... (40 episodes, 1999-2000)
 Additional Voices / ... (40 episodes, 1999-2000)
Adrian G. Griffiths
(40 episodes, 1999-2000)
Kathleen Barr ...
 Additional Voices (40 episodes, 1999-2000)


In this 3rd cartoon of Sonic the Hedgehog, Sonic and his two siblings, Manic and Sonia are the hit rock band, Sonic Undeground. But in reality they are the children of Queen Aleana, the queen of Mobius. Queen Aleana was abandoned from Mobius by Sonic's enemy, Dr. Robotnik who turned Mobius into a waste land. So now Sonic, Manic and Sonia must fight Dr. Robotnik and his two sidekicks, Sleet and Dingo and the SWAT Bots, with the aid of their metal medallions and bring peace to Mobius and find mother! Will the hedgehogs find their mother? Will they defeat Robotnik? The resistance begins on Sonic Undergroud! Written by Stuart Brewer

Plot Summary | Add Synopsis


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Release Date:

30 August 1999 (USA)  »

Also Known As:

Sonic le rebelle  »

Company Credits

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Technical Specs


(40 episodes)

Sound Mix:


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Did You Know?


The last DiC Sonic the Hedgedog cartoon to feature Jaleel White as the voice of Sonic. See more »


In the title sequence there is a number of clips with Queen Aleena Crying however one of these clips is played backwards; this is obvious as the tear goes UP her face. See more »


Dingo: When I'm ruler of Mobius, Sonia can be my queen!
See more »


Spun-off from Sonic the Hedgehog (1991) See more »

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User Reviews

A Sonic universe of political intrigue
12 October 2003 | by (Arizona) – See all my reviews

This show is great! The setting takes place in an apocalyptic future where Robotnik is the head of the oppressive government and Sonic and his siblings Manic and Sonia fight for freedom. They came up with some interesting show elements for this, like the alternate universes, other cultures, experiments, oracles, and people in danger. Sleet the wolf/dog was a cool character.

SU had excellent animation, but it did take place in a dingy city, so that might have lessened the impact. I liked the music-video songs that they sang; some were good. All the intrigue of the hedgehogs trying to find their mother the queen, Sonia getting mixed up in Robotnik's politics because of her friend Bartleby, the character humor, nice music and sound effects, and the variety of settings and plots makes this one of the best cartoons I've seen! This was my favorite show when it aired. I have seen pretty much all the episodes. However, it was a little repetitive sometimes with the constant escape from SWAT bots and Sonic's constant mentioning of chili dogs. Sonic Underground is much better than this new Sonic X series, which has slower, less interesting plots.

10 of 13 people found this review helpful.  Was this review helpful to you?

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