I got this crazy idea one night about this new powerup: The super mushroom, but with legs, and it could turn around once it got to a ledge. I don't really know what to call it. You guys can call it whatever you want.
Now make a jumping fire flower, a "paratroopa movement" leaf, a tanooki suit that turns to stone and you can't pick it up while it's stone, and a star that kills anything it touches including moorio.