DB Episode 102
From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Synopsis
As Son Goku set out on a quest for revenge, his friends attempted to learn the identity of Kuririn's killer. All clues led to Turtle Hermit's past – an evil that could destroy the world. The story of Piccolo Daimao was revealed by Turtle Hermit, who explained that Piccolo Daimao had at one time plunged the world into terror with his demon army until Turtle Hermit's master, Mutaito, sealed him away in an Electric Rice Cooker using an ultimate technique which had cost him his life. It was revealed that Pilaf and his gang found the box, freed Piccolo Daimao, and told him of the Dragon Balls. Piccolo Daimao now wanted the roster of all the martial artists who had participated in the last Tenkaichi Tournament as well as the Dragon Balls to grant him a wish.