endless stairs glitch
there is a glitch to go up bowser's endless stairs without 70 stars. to do it, you run up the stairs forward for a couple of seconds then turn around and long-jump (run, crouch[L], and jump), then keep long-jumping, but backwards, up the steps (NOTE: you need to be pressing A as fast as you can) and if done right, you will be at the top of the steps.
PS: hard to do, may require practice
PSS: can only be done for fun, because when you do the glitch and beat bowser, at the end of the credits when mario says, "thank you very much for playing my game", the game freezes at that screen....so the glitch is useless (and im not the only one that has had the game freeze at that point...)