IMDB Rating: 5.7/10 from 761 votes
Synopsis: Watch Sonic Underground online free. In Sonic Underground Putlocker Full Episodes, Sonic Underground is an animated series that follows the adventures of Sonic the Hedgehog and his siblings, Sonia and Manic. The cartoon follows a main plot separate from all other Sonic the Hedgehog media. The series ran for two seasons, each of twenty episodes. As of June 11, 2012 re-runs of the series began airing on Disney XD.