, also known by Toei's own English title The Strongest Guy in the World, is a 1990 Japanese animated science fiction martial arts film and the second feature film in the Dragon Ball Z franchise. It was originally released in Japan on March 10 between episodes 39 and 40 of DBZ, at the "Toei Manga Matsuri" film festival along with the second Akuma-kun film (Welcome to Devil Land) and the 1990 film version of Sally the Witch. Plot Gohan and Oolong search for the magical Dragon Balls and their radar shows them that the orbs are being gathered by another, unknown party. They investigate near a large wall of ice where Piccolo is training. Meanwhile, the mad scientist Dr. Kochin, having successfully gathered all of the Dragon Balls, summons the eternal dragon Shenron and wishes for Dr. Wheelo and his lab to be released from the ice. The ice breaks away as a building emerges and Gohan and Oolong are attacked by Dr. Kochin's "bio-men". Piccolo saves them but is overcome by three mysterious warriors while Gohan and Oolong escape. Dr. Kochin and his bio-men soon present themselves to Master Roshi who refuses to accompany them to Wheelo's lab and defeats the bio-men. Dr. Kochin kidnaps Bulma to force Master Roshi to pursue them. At Wheelo's lab, Master Roshi is forced to fight three "bio-warriors" but is swiftly defeated. Bulma discovers that Dr. Wheelo's mission is to obtain the body of the strongest warrior on Earth to become the host for his brain, which is currently separated from his deceased body and kept alive by his advanced technology. Bulma informs him that Goku will undoubtedly be coming to rescue them and that he is much more powerful than Roshi. Meanwhile, Goku learns of situation and he arrives at Dr. Wheelo's lab and is confronted by Mikokatsun, Kishime, and Ebifurya – Dr. Kochin's three bio-warrior henchmen. Goku defeats Mikokatsun but is frozen by an ice-like attack launched by Ebifurya. Gohan and Krillin arrive to help but are no match for Kishime. Goku breaks free from ice with his Kaio-ken technique, defeats the two remaining bio-warriors, and confronts Dr. Wheelo. Piccolo, who has been brainwashed by Dr. Wheelo, attacks Goku. Gohan tries to stop Piccolo but fails, causing his anger to explode, shattering Dr. Wheelo's brainwashing device. Dr. Wheelo is stunned by Gohan's power and desires to steal his body instead. He