Despite only having a single appearance on the series a full two seasons before this toyline launched, the Giant Robot was an obvious choice for the toyline and makes a smashing addition.
Here is a robot as you take him out of the box, note that shoulders come separately. These shoulders are often found missing in the secondary market.(pic courtesy of Bill Frost)
The box describes him as the "Robot that controls the World." Well, that didn't really happen but still, he's one of the cooler designed creatures of the era so who cares?(pic courtesy of Bill Frost)
Despite the serial in which he came from being simply called "Robot" and the character only grows large in the final chapter of the story, the word's "Giant" have followed it's name on a good deal of merchandising including the novelisation. The Robot's name is actually K1 in the serial.