Haunted Room

OK, I'm done with haunted room. You may ask, what the heck am I talking about? OK, this is just a little secret, but in Princess Toadstool's Castle, there is a Toad that'll inform you that there is a creepy place in the castle basement, and if you go further into this creepy area, you'll found a door marked by a Starman. That door requires 50 stars, and that's where the noises are coming from. If you can open this door, you'll be in the haunted room.

Now, this is just a rumor, but the room was said to be where the famous artist Vincent Van Gore once stayed. I'm not revealing how the room looks like though... let's keep it as a spoiler.