I remember playing SSB at my friend's house when I was in middle school, it was great times. The problem with a straight port would be that you couldn't do multiplayer without some recoding of the game. And arguably, multiplayer is the focus for that game, and its series.
Nay! Nintendo should release some good GBA games - and then skip on this game because nostalgia is it's only selling point for a terrible game. --- "Evil, beware. We have waffles..." - Raven, Teen Titans