Related Information for Sonic Underground Sonic Underground (Sonic le rebelle in French) is an animated series that follows the adventures of Sonic the Hedgehog and his siblings, pink hedgehog Sonia and green-hued Manic.While it was believed for a while that 65 episodes were made of which only 40 aired, Ben Hurst, a main writer from the animated series Sonic the Hedgehog (dubbed SatAM by fans), who was also involved in Sonic Underground's production, stated in a chat at the Sonic Amateur Gaming Expo that only 40 were.. read more