Oolong

Oolong (ウーロン, Ūron), also known as Woolong, is an anthropomorphic, shapeshifting pig who met Bulma and Goku while on their quest finding the Dragon Balls. After their adventure, he begins living at Capsule Corporation in West City. He plays a large role in the beginning of Dragon Ball, but by the end of Dragon Ball Z, he just shows up from time to time in the company of Master Roshi.