Mazinger Z, it was still highly popular to run a very successful 56 weeks. In fact, it even spawned a line of best-selling toys and merchandise as did its predecessor, as well as several spin-off theatrical featurettes. For example, it paved way for the creation of UFO Robo Grendizer. In addition, footage from Great Mazinger's sole appearance in the final episode of Mazinger Z was aired as part of the US version of Mazinger Z, known as Tranzor Z. At that time, however, Great Mazinger had already been introduced to millions of American children under the name of Mazinga. As one of the imported products, the 24-inch Jumbo Machinder toys were released in the US by Mattel as part of their Shogun Warriors line in 1976. 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. Along with Jun, Tetsuya and the Great Mazinger are also featured in the Mazinkaiser OVA and Mazinkaiser: Death match! Ankoku Daishogun movie. The characters have been also a mainstay in Banpresto's Super Robot Wars, a popular battle-simulation/RPG series of video games based on many anime mecha shows. This includes the original Mazinger Z, Getter Robo, the Gundam series, and Neon Genesis Evangelion among others. Moreover, Tetsuya appears in Shin Mazinger Shougeki! Z Hen. Modern versions 2002: OVA version In the 2002 OVA Mazinkaiser, Tetsuya fights alongside Kouji against Doctor Hell's forces. The OVA version of Great Mazinger is physically identical to the original, but with black coloring on the arms and legs instead of blue. Great is seriously damaged during the initial battle in the series. Near the end of the OVA, Tetsuya returns with a new and much more powerful Great, which is discovered in Doctor Juzo Kabuto's laboratory. 2003: Movie Great also returns in the 2003 movie Mazinkaiser: Deathmatch! Ankoku Daishogun, where Tetsuya once more fights the Mycenae Empire using the prototype Great Mazinger for unknown reasons. Speculation is that both Mazinkaiser and Shin Great Mazinger were being upgraded in the Photon Labs, forcing Tetsuya to use the prototype Great Mazinger. This time, however, Great is incapacitated rather quickly, surviving battle but unable to