Robot Junior was a secondary character from later episodes of Great Mazinger, and the chogokin portrayal has become quite difficult to find. (Near-universal loathing for the design seems to have kept the production run to a minimum.) The bats can be removed from the back, and a missile can be fired from the elbow of each arm. Popy originally planned to produce a "popinika" of the baseball-cap-shaped spacecraft that forms the cockpit of the robot, but it never saw actual production.