- 2 Seasons
Sonic Underground occurs in a separate universe from any other Sonic the Hedgehog universe. The wise and kind ruler of Mobius, Queen Aleena, is dethroned by Dr. Robotnik with his machine armada. After seizing control, Robotnik exiles the royal family, sending the children into hiding. In order to ensure the dynasty's survival, Aleena leaves her three kids: Sonic, Manic, and Sonia (all three of which are voiced by Sonic's first voice actor, Jaleel White) with the Oracle of Delphius. Her reasons for doing so revolve around a prophecy that they will all rejoin to form a Council of Four. As this Council, they will have the power to restore order and regain their ruler ship of Mobius. In the interim, Dr. Robotnik has established an autocracy, legally able to turn dissenters and rebels into robotic drones, as well as extorting funds from the surviving nobility. When the three children come of age, the Oracle explains the prophecy to them. Emboldened with this information, Sonic, Manic, and Sonia head off on a quest across Mobius in search of their mother. Dr. Robotnik has hired a pair of bounty hunters, Sleet and Dingo, who repeatedly try to catch the children and thus negate the prophecy. Sonic, Manic, and Sonia each possess a magical medallion that can become a musical instrument, as well as weapons when the three are together in harmony. Sonic can access an electric guitar, Sonia can utilize a keyboard which also works as a smoke machine, and Manic medallion can transform into an "earth controlling" drum set with cymbals shown to deflect laser blasts. Each of the medallions can also be used to fire as if it were a laser gun. As the amulets can also metamorphose into musical instruments, the triplets use them to perform musical concerts, usually at least once per episode, as "Sonic Underground," an underground and illegal rock group.