The Giant Robotno was a massive robot created by Mayor Kintobor of Kintopolis in an alternate dimension. It was designed to travel to Knothole Island and recover fragments of a Chaos Emerald (which Mayor Kintobor had split in half) in order to power more defense robots to combat the giant, mutated, feral versions of the Knothole Freedom Fighters in his dimension who had been exposed to the emerald's radiation. This goal was achieved by Sonic Prime, who used his speed to power the device and fend off the mutated Freedom Fighters, including the counterpart to his father, Jules-Zilla. (SSS: #12)
- The Giant Robotno was most likely inspired by either Mechagodzilla or Moguera.