Robotnik finds himself at odds with a small collective group called the Freedom Fighters, who operate out of the hidden woodland village Knothole. They are led by Sonic the Hedgehog and Princess Sally Acorn, the King's sole heir. Other members include Sonic's best friend Miles "Tails" Prower, computer genius Rotor the Walrus, French coyote Antoine Depardieu, half-roboticized Bunnie Rabbot, and Dulcy the Dragon. They act as a rebellion against Robotnik's regime. Sonic uses the Power Rings to gain a temporary boost in power. Both the rings and the Roboticizer were designed by Sonic's uncle Chuck, one of the victims of the machine.