Doc Ratcheturn was a robot native of the Sol Zone who traveled around the oceans of his world looking to repair injured robots, likely including the Sol Zone Pirates. From one particular voyage, Ratcheturn never returned; instead his vessel sailed in with the future Captain Metal at its helm. What became of Ratcheturn is unknown, though his final patient was certainly grateful for his second chance at life. (SU: #56)
- Ratcheturn's name is obviously a play on the words "ratchet turn."
- Ratcheturn resembled Dr. Ivo Kintobor, the Moebius version of Dr. Eggman, as a skinny figure with an orange moustache.
- Doc Ratcheturn was the only Sol Zone robot to display fairly benevolent tendencies, his only apparent agenda being the repair of his fellow robots.