The Freedom Fighters is a group that appears in the Sonic Underground television series. They are a group of people under who oppose the tyrannical rule of The Royal 'Corrupt' Hedgehogs. Their leader is Good Robotnik.
For an unknown told of time, the Freedom Fighters had been attempting to overthrow The Royal 'Corrupt' Hedgehogs in order to restore peace to their kingdom. When the Sonic Underground arrived in the alternate dimension, they eventually joined the Freedom Fighters and helped end the tyrannical rule of the hedgehogs by showing them the errors of their ways.