The first season opens with Sonic and his two siblings, Manic and Sonia who are the hit rock band, Sonic Undeground. When they seek to find their mother and defeat the tyrant, Robotnik who takes over Mobius and turns it into a waste land.

• Sonic Underground - Season 1
• Maurice LaMarche
• Garry Chalk
• Gail Webster
• Marc Boréal
• Francois Hemmen
• Daniel Sarriet
• Tom Smith