Great Mazinger
Great Mazinger was also the star of the short theatrical "team-up movie features" released in Japan such as "Great Mazinger versus Grendizer", and "Great Mazinger versus Getter Robo G" among others. They were based on the anime crossovers of the manga creations of Go Nagai. For example, Tetsuya pilots an earlier version of Mazinger Z called Energer Z.