Shifty Boo Mansion

Shifty Boo Mansion, or World 3-3, is the third level in World 3, and the fifteenth overall. There are many Boos and False Goal Poles. It's pretty straightforward.

GS 1: When you see the painting of a Boo, go into it, and you have ten seconds to navigate the circling room and get the Green Star.

GS 2: When you enter the library area, go up to the top left to slowly make the shelves pull away to reveal an alcove with the Green Star.

GS 3: Once you are prepared for the final stretch, ride the couch up to a platform above the door to it. Try to enter the pipe. It's false. But the Green Star that's in it is not.

Stamp: You must ride the first posessed couch up to the Stamp, which is a Boo.