In Paper Mario: Sticker Star, you can tell that the developers were making up the events of the game as they went along instead of planning all of them out before developing the game. For instance, the Paperize area for the lightbulb sticker is four times bigger than the lightbulb sticker which doesn't make sense and also the game never gives you any clues that you need to see Wiggler to get to Bowser's Castle.