Brawl Kirby would probably be a little bit worse than Melee Kirby >.>
His Fthrow->Uair combo only works due to very low falling speeds, in Melee most characters could land and CC the hit before it happens. His Utilt knockback is too great to combo out of at higher damages and his Uair is ********. I would take a quick kill move over a move that only combo's at really low damages. Hammer becomes pretty much as useless as characters are now fast enough in the air and on the ground to avoid such a slow attack.
SSB Kirby would be absolute ****. His Dair is instant meaning it no longer has to be spaced, his Fair would more than likely act like Fox's Dair, only escapable by Smash DI. His lack of a good Uair is
but a sex kick is always good. His loss of a forward B is rather meaningless considering how **** the Hammer is.