Raditz is Goku's older brother. His name is a pun on radish.
He appears at the start of DBZ and tells Goku he is a Saiyan. Raditz wanted
Goku to become evil as he was an insult to the Saiyans, but Goku didn't want
to, so Raditz kidnapped his son Gohan. In the end Raditz was killed by Piccolo.
