Pilaf Gang

Emperor Pilaf is a short imp who desires to take over the world using the Dragon Balls. His two most significant henchmen are Shu and Mai. It is implied a couple of times early in the series that he has other minions as well, but they are unseen. One notable thing of Pilaf, is that he has a disposable amount of resources. The original base for his forces was his castle in the Diablo Desert. When Goku turned into a great ape and destroyed it, he got a new base which was a flying fortress, which was later shot down by Colonel Silver's troops. One significant thing they later acquire is the Pilaf Machines, which are giant battle robots they use to fight Goku making them a bit more closer to Goku's strength in battle. King Piccolo was released by Pilaf, which ultimately backfired when he took over and made his own forces. The Pilaf forces return to interrupt Goku and Chi-Chi a couple times on their quest for the Bancho Fan. In video games it is implied that Pilaf's Castle was rebuilt sometime after the Piccolo Jr. Saga. Pilaf and the rest are shown still together in Dragon Ball GT and accidently use the Black Star Dragon Balls to turn Goku into a kid.