The Mercian Freedom Fighters are a band of Freedom Fighters located in the former Kingdom of Mercia led by Rob O' the Hedge. During the fight against the High Sheriff, all of the Crazy Kritter Freedom Fighters except their leader were captured roboticized and fought against Rob as he continued fighting the High Sheriff. Eventually, both the High Sheriff, (who was really Armand D'Coolette), and the other members of the Crazy Kritter Freedom Fighters were De-Roboticized by the Bem.
The group was likely made after Robotnik's Coup d'état and fought against the tyranny of Dr. Ivo Robotnik's Sub-Boss known as the High Sheriff. Tragedy befell the group, however as every member except Rob was captured and subsequently roboticized and was programmed to serve the High Sherriff. Rob continued to spy on the High Sheriff and his operations, hoping to one day free his comrades.
The Crazy Kritters were later de-roboticized by the Bem and fought along side Rob during the fight against the Xorda.
Munch the Rat
Thorn the Lop
Rob O' The Hedge