King Piccolo

"A musical instrument. Didn't see that one coming, Piccolo."

-Piano to King Piccolo after "Cymbal's" birth

=Dragonball=

When introduced, King Piccolo is very aged, which effects his powers. Because of this, he is searching for the dragonballs to get the dragon to grant him youth. However, the fact that Goku is collecting the dragonballs gets in his way. After Goku defeats Piccolo's latest creation, Cymbal, Piccolo decides to fight him personally, and wins. He then manages to steal all the dragonballs, and wishes himself eternal youth, afterwards, Goku fights him again, and is able to win, by jumping off the ground, and ripping through King Piccolo's chest.

Before he dies he shoots out an egg, carrying his final spawn, Piccolo Jr. When Goku meets the guardian of Earth, Kami, he learns that Piccolo is the evil part of him that Kami had to expel in order to get the guardian of earth position.

=Dragonball: Evolution=

In the live action movie, King Piccolo, known as just Piccolo, he is an evil alien who wants revenge on the earth, and to prevent Goku and company from stopping the arrival of the Oozaru by keeping them away from the dragonballs. Little similarities can be seen between the anime/manga and the movie.