Getter Robo Āḥ is the fifth Getter Robo series chronologically.
Taking place several years after Getter Robo Go, Earth is now a post-apocalyptic world. Hayato, now an aging scientist, has completed Professor Saotome's masterpiece, Getter Robo Āḥ. Piloting it are Ryoma's son Takuma, the human-dinosaur Kamui and the younger brother of Tayel, Baku. Alongside the reformed Dinosaur Empire, they fight the insectoid Andromeda Flow Country attacking from across time and space.
— Description from AniList community (anilist.co).
