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When a Pod lands in Knothole, Sonic and Sally realize the Doomsday Machine is already in operation. The Freedom Fighter groups break into the Doomsday Machine, only to find Robotnik let them in. Sonic tries to destroy the control room but is thwarted and almost roboti-sized. Uncle Chuck suggests they use the Power Stones to overcome Robotnik and, with Nicole's help, Sonic finds Robotnik's Power Stone.
After Antoine saves Sally's life during a raid, Sonic can't stand his bragging and zips in to see Uncle Chuck, who finds out his "bug" in Robotnik's HQ is malfunctioning. While Chuck goes to fix it, Sally and Bunnie, flying a "Rotor- created" Hover-Unit, find the Doomsday Machine and download its schematics, along with a Top Secret file detailing a plan to catch a spy by damaging the "bug" at HQ.
When Uncle Chuck's "bug" reveals Robotnik's search for the legendary Deep Power Stones, he informs Sally, who tries to retrieve data regarding the Royal Family Secret.
On a mission to contact the first Freedom Fighters on the King's List, Sonic and the others are forced to travel through a tunnel which carries a "curse" against all intruders.
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- Premiered: September 18, 1993
- Rating: TV-Y
- Premise: The video-game superhero defends the planet from a mad scientist. There was also a syndicated version called `The Adventures of Sonic the Hedgehog.' (more)