Verified answer

ok, first of all. This is a good guide to your problem.

First: Enter the castle and go through the door on the left.

Next: You will see a big boo, he will run away. Follow him down the hallway.

Third: You will come to a room full of boos, sneak up behind each boo and kick it in the back. A coin will appear.

Fourth: kick all the boos, and you will find in one boo a lantern.

Fifth: the lantern will be on the floor walk towards it and press a or the action button to go inside the lantern

Finally: You will find new levels to beat, which will help you earn more stars.

Hope this helped!

well, i don't really know what you are talking about (lol) so i would check ign.com or another website.

sorry :(