Great Mazinger vs. Getter Robo (グレートマジンガー対ゲッターロボ, Gurēto Majingā tai Gettā Robo) is an animated film produced by Toei based in the works of Go Nagai and Ken Ishikawa. The film premiered originally in March 21, 1975 (1975-03-21) in Japan. It is a crossover between the super robot anime Great Mazinger and Getter Robo, similar to the previous crossover film Mazinger Z vs. Devilman.