In the Dragon Ball canon
He is the son, and apparently the reincarnation, of King Piccolo, who was killed by Goku. He is also the missing half of Kami, whom in the early Cell Saga he reunited with (via Namekian Fusion) to become the Nameless Namekian.
World's Got Talent - World Tournament Quest
This One-Time Quest requires the player to compete in 10 ranked matches, and will award the player 1,000 Zeni and 16,000 EXP. The results of the matches do not matter.