After defeating Frieza, Goku returns to Earth and goes on a camping trip with Gohan and Krillin. Everything is normal until Cooler - Frieza's brother - sends three henchmen after Goku. A long fight ensues between our heroes and Cooler, in which he transforms into the fourth stage of his evolution and has the edge in the fight... until Goku transforms into a Super Saiyan.
Dragon Ball Z: Cooler's Revenge is a 1991 Japanese anime science fiction martial arts film and the fifth Dragon Ball Z animated feature film, originally released in Japan on July 20 at the Toei Anime Fair. It was preceded by Dragon Ball Z: Lord Slug and followed by Dragon Ball Z: The Return of Cooler. Set in an alternate continuity to the main story, the movie introduces Cooler, the estranged older brother of Frieza, who travels to Earth to challenge Goku.
