Black Star Dragon

This is the most powerful dragon in the entire Dragonball series. 

He was made when Kami and Piccolo were one person. This 

dragon can do anything you want it to, but, the catch is that after 

you wish for something the Dragonballs get scattered across the 

universe. The worst thing about them though is that if you don't 

bring the Dragonballs back to where the planet the wish came 

from was, the planet will be destroyed.