Quote:"I thought it'd be nice to have her as a playable character, but the toad characters had a similar physique to a Mario character than Peach does. And if one of the four had a dress, we'd have to come up with a special programming to handle how the skirt is handled in the gameplay, and that's really the only reason why Peach isn't playable (laughs). Of course If we had Wario in there we'd have to program a way to make him fart. (laughs) "
Real good excuse to not have a little extra coding on one character being playable just for the sake of being lazy Miyamoto.
real good fucking excuse
Also I highly doubt that there would be a new character for a boss, it's probably just Bowser with a few extra codes programed into him to make it feel a little more original.