41 Fans
Sonic Underground
TV Series (1999)
This is an animated tv series that follows the adventures of Sonic the Hedgehog and his sister Sonia and Brother Manic. Freedom Fighters travel around Mobius to battle Robotnik's forces on a global scale; and that Robotnik has left most of the Mobian people unroboticised, leaving multiple cities, a poor underclass, and an aristocracy for the heroes to interact with.
Last Episode
01x30 Harmony or Something Aired: Jan. 16, 2004Sonic, Sonia and Manic put their training to the test as they embark on a mission to rescue the Oracle from Robotnik! Can they work together … [continue reading]
Series Info
Character Guide
Series Fun Facts
- Sonic's mohawk was redesigned to have three rows, along with his teeth being shown more and his eyelids are more visible.
- This is not a sequel or spin-off of any of the other earlier "Sonic" programs, but a new series altogether.
- Sonia is the only triplet to have a neck while Manic and Sonic don't have one.










