The Freedom Fighters are a group that appears in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. They were alternate versions of the Mobius Prime's Knothole Freedom Fighters.
Under the leadership of Sonic the Hedgehog and Sally Acorn, the Freedom Fighters managed to defeat their arch-nemesis, Dr. Robotnik. Believing their enemy destroyed, the Freedom Fighters found peace, despite the loss of their computer friend NICOLE. Sonic and Sally married and had two children, Manik and Sonia, and also managed to rescue Sally's father Maximillian Acorn. Bunnie Rabbot was also De-Roboticized, while Miles "Tails" Prower, Antoine D'Coolette, and Rotor Walrus enjoyed happiness as well. At the request of Queen Sally, Rotor created a duplicate NICOLE, equipped with information about their history and a firewall that would prevent anyone from accessing too much information. The Freedom Fighters then sent the new NICOLE to Mobius Prime, where she would join the Knothole Freedom Fighters.
In a sad twist, the reality to which NICOLE had been sent had its own Dr. Ivo Robotnik sent to this Mobius by his rebellious creation, E.V.E. After materializing in front of the royal family, Robotnik was transported to an orbiting space station, where he encountered the Roboticized Dr. Eggman. The villain had uploaded his intelligence into the station upon his defeat, and felt that his extinction was imminent. However, Robotnik Prime rekindled his old fire for world conquest, and the villain sent his counterpart back to Mobius Prime to continue the fight against his own set of Freedom Fighters.
Not content with liberating his counterpart, Eggman scanned Robotnik's mind in order to learn the location of a piece of the Giant Borg battlesuit, which he utilized to build himself a new body. The first victims of his return were the Freedom Fighters who had defeated him, as he leveled Mobotropolis with a nuclear assault. With no Sonic left to oppose him and Robotnik Prime defeated in the interlude, he relocated to Mobius Prime in order to contend with the counterparts of his defeated foes.