ff IX storyline (baically Zidane's) is very similar to Dragon Ball, see:

DB: Goku, a kid (with TAIL) from another planet was sent to earth to conquer the planet, then he hit his head (when he was a baby) and actually forget about his original purpose and become a good guy...

i just realized that... Zidane's basic plot is basically exacly like DB's Goku!!!