Eiichi Shimizu and Tomohiro Shimoguchi launched a Getter Robo spinoff manga, Getter Robo Devolution: Uchū Saigo no 3-bun Kan (Getter Robo Devolution ~The Last 3 Minutes of the Universe~), in Akita Shoten’s Bessatsu Shōnen Champion magazine in December 2015 and ended it this past June.
Amazon is listing the third compiled book volume of Bingo Morihashi and Drill Jiru’s Getter Robo High manga as the last volume.
Morihashi and Jiru launched the manga in Takeshobo’s Kindai Mahjong (Modern Mahjong) magazine in January 2017.
The manga is based on Ken Ishikawa and Go Nagai’s Getter Robo anime and manga franchise.