It's definitely regular Bowser, not BB. But DK doesn't punch him out--Bowser's barely fazed when DK hits him.
Heh, you guys are so mean to poor GG. At least she's on topic now, somewhat. But I agree, that's not the kind of resolution Wario or Mario would make. Wario's would probably involve money, gems, property, money, fame, money, and whoever that chick is who's alluded to in the WL4 manual.