Oh no...
*ducks and covers*
Firstly Goku fights enemies you can literally destroy planets with a minor blast of energy with no effort at all. Like original Broly. He was a bit above Cell power wise right? He blew up a planet that was light-years away like nothing at all. Later in the series cell is defeated (when he comes back) with no trouble at all.
Frieza did the same to planet Vegeta and by the end of DBZ he's as weak as a gnat compared to the Z Fighters, a one hit kill for Goku, Gohan or even a 'lesser' hero.
So when you get to enemies as tough as Buu it is just so powerful that he alone can kill galaxies with no effort at all, there is just no discussion on the power that was needed to kill them.
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But hey Superman can move the Earth, so yeah. Maybe he could take on Kid Goku....maybe...
Also:
(http://t0.gstatic.com/images?q=tbn:ANd9GcTfdVyheocLADViVGN7Qks36e9RccXR_IebajzkjLFtlplokuCBAs1UEmDG)
http://www.youtube.com/watch?v=LJP1DphOWPs&feature=player_embedded# (http://www.youtube.com/watch?v=LJP1DphOWPs&feature=player_embedded#)