Oolong

Oolong (ウーロン, Ūron) is a major character in the Dragon Ball series, first appearing in the Dragon Ball manga and anime. He is an anthropomorphic, shapeshifting pig-like Earthling who meets Bulma and Son Goku during their quest for the Dragon Balls. Initially appearing as a 'demon' who kidnaps village girls, he later joins the main group, becoming a companion to the protagonists. Oolong's signature trait is his shapeshifting ability, though each transformation is limited to five minutes with a one-minute cooldown. He attended the Shapeshifting Academy but was expelled for stealing the teacher's underwear. He is cowardly, perverted, and enjoys collecting women's underwear, often clashing with Bulma, and provides comedic relief to the story. Despite not being a fighter, he plays a crucial role at times, like when he interrupts Emperor Pilaf's wish by asking for a pair of women's panties instead. While he has a reduced role in Dragon Ball Z and GT, he still appears as a comedic character alongside Master Roshi.