The packaging of larger figures revealed a back story along the lines of the Japanese series, with the Machine Robo mecha being used to defend Earth from the alien Devil Invaders.
In 1983, Tonka purchased the rights to distribute Machine Robo in America, and began refashioning it into the GoBot line.
During this phase, a wider range of figures was issued, including the Super GoBots, Puzzler and the playsets.
The main human character, Charlie Bampton, appeared later in the series, and was shown to possess the powers of ESP and telekinesis.
Due to all the Gobot trademarks being owned by Hasbro, the figures were largely issued with designations once again, rather than names.
It was meant as an attempt to revive the European Robo Machine toyline that ran from 1982 to approximately 1988.
The Robo Machines toy line featured a total of 27 transforming robot figures, and was released by Bandai in France, Germany, the United Kingdom, Ireland, Belgium, Spain, and the Netherlands.