Originally, the Turquoise Hill Freedom Fighters lived in the Green Hill Zone. The likes of Tux, Joe and Sally would frequently find themselves captured by Doctor Ivo Robotnik and used as organic batteries for his Badniks. Fortunately, they would always get rescued by Sonic the Hedgehog. They later moved to the Emerald Hill Zone and began working on a secret base that would allow them to hide from Robotnik, now that he was ruler of the planet. Whether or not the base was finished, the Emerald Hill folk expanded into numerous villages throughout the Zone.