DragonBall GT is a very cool series with alot of action. It starts when Lord Pilaf gathers the Black Star DragonBalls to grant the wish of turning Goku into a kid so he could kill him easily, but his plan back-fired because he kept his power, but he can't use his Instant Transmission Technice any more, but Pilaf didn't know that if the Black Star DragonBalls aren't gathered in the next year the Earth will explode.

I'll have to do more research.