§ PICCOLO'S HISTORY §
Piccolo is a native of the planet Namek. He was reborn from an older, evil Piccolo-daimao [or King Piccolo], who in his last moments of life spat out an egg, which then hatched into this "new" Piccolo. Daimao himself was the "evil" split half of Earth's guardian, Kami.
After the defeat of Piccolo-daimao at the hands of the child Goku, Piccolo "Junior" bides his time and then enters the World Martial Arts Tournament. He and Goku face off in the very lengthy, very vigorous Finals match, where Goku wins--and proceeds to feed Piccolo with a Magic Bean to help him recover and leave the arena.
Piccolo is the second strongest being on Earth. He wears an extremely heavy cape as constant training for his muscles. He is renowned for his powerful energy blasts as well as his ability to split into two or four separate entities. Green like a lizard, Piccolo has the ability to regenerate any limbs that he may lose in battle.
Dragonball Z Storyline
He started out fighting against Goku to rule the world, but when the Saiyans arrived, Piccolo was forced to join forces with Goku and the others to defeat a greater, more powerful evil.
At first the alliance with Goku is uneasy, but as the story unfolds, their bond becomes stronger. Piccolo even steps in to train Goku's son Gohan for the upcoming battle against the Saiyans. Piccolo was confused by the bond he felt with Gohan and by his own actions. Gohan sees the good within Piccolo and their relationship brings this out of the Namek warrior.
In the showdown against Vegeta and Nappa, Piccolo saved Gohan's life by jumping in front of an energy blast targeted at the boy. One could say that Piccolo did this out of "paternal" instinct more than anything else.
Upon his resurrection, Piccolo proceeded to serve as a very valuable ally in the battles against Raditz, Freeza and the Red Ribbon androids, stepping in as Gohan's secondary father figure. With Cell's impending completion and the threat of this "perfect" android's strength, Piccolo was led to merge with the god Kami. This lead to a great increase in his already formidable powers and intellect.