^ Perhaps, but i think that might start getting complicated with programming
and as far at that idea going into a stage, as much as i would LOOOVE a SMRPG stage, i dont think that one would be a good choice cause the whole disabling buttons would get extremely annoying, and it probably wouldn't be any fun.
I think the best stage idea was on top of Bowser's castle with Exor in the background and every once in a while he's use Corona which would deploy a thin beam across the stage rapidly, damagin players who it hits. And if you hit the hilt of Exor enough (which im not sure how that could be done if he's in the background...) then his mouth opens up and an portal suck players in, taking away a life (i know that sounds kinda cheap, but bullet bill was essentially a one hit KO in peaches castle in Melee, besides, you could make it so that is was fairly easy to escape the portal.)