Dragon Ball Z: Fusion Reborn
Dragon Ball Z Fusion Reborn, known in Japan as The Rebirth of Fusion Goku and Vegeta Japanese Z , Hepburn Doragon Bru Zetto Fukkatsu no Fyjon Gok to Bejta? , is the 12th film in the Dragon Ball series. It was originally released in Japan on March 4, 1995 at Toei Anime Fair, and dubbed into English by FUNimation in 2006, originally receiving a theatrical release along with Dragon Ball Z The Return of Cooler before going to DVD.
While fighting in the final of another Other World Tournament, Goku and Pikkon are interrupted by the appearance of a crystallike substance all over the place, and are sent to see to the disturbance. They find the CheckIn Station and most of the Other World encased in crystallike jelly beans which are immune to their energy attacks. From inside the station, King Yemma directs them to the culprit, sitting on the roof. The monster, who is unable to say anything other than its own name, Janemba, refuses to put the barrier back after Pikkon insists. Goku decides to lure Janemba down to Hell to fight him while Pikkon tries to free King Yemma.Earth comes under siege by an array of villains, one of them a comical parody of Adolf Hitler and his Wehrmacht, as well as an army of deceased past villains led by Frieza. Gohan makes quick work of Frieza, causing the villains to scatter. During the fray, Goten and Trunks gather the Dragon Balls, summon Shenron and ask him to put the barrier between the living and deceased worlds back up, but Shenron claims that he cannot grant the wish, since only King Yemma has that kind of power. In Hell, Goku and Janemba engage in a gamelike fight, with Janemba taking the upper hand against Goku. Goku realises that despite Janemba likely not meaning any real harm, he is nevertheless a danger to both worlds, and powers up to Super Saiyan 3. In his new form, Goku dominates Janemba and literally smashes his head in, but Janemba merely transforms into a much smaller but more powerful and sinister form and again takes the upper hand, almost killing Goku, but Vegeta, having regained his physical body, arrives in time to help. Both Goku and Vegeta are no match for Janemba and are forced to hide. Goku proposes fusion, but Vegeta refuses to join bodies with Goku, given his pride. ........
Source: Wikipedia