Watch Sonic Underground Season 1 Episode 1 full movie online free in HD with English subtitles – no download needed.
Sonic Underground: Queen Aleena tells the story of how Dr. Robotnik took over Mobius, and how she had to give up her three children, Manic, Sonia, and Sonic, to fulfill a prophecy exclaiming that one day, the siblings will be able to rise against Robotnik's rule and restore peace to the planet.