Lol maybe you should say that it is on the entrance rug, but i found it! Yeah you could already know because of my reaction but i never noticed that either! It has nothing to do with this game sadly, it would be cool if they made little minigames for some Nintendo franchises, like a arching game based on Zelda and a Mario 3D Land themed co-op puzzle or something, maybe a game where you have to throw wooden barrels at enemies based on Donkey Kong! I know it's a whacky idea and it will not happen but we can dream about it right?
Practically like some people already said, took me like three minutes before I gave up and scrolled threw the comments until I saw that someone told me where it was >.<
I noticed that the first time I went in. I always look at it every time I visit her. I think it's pretty neat. I wonder if there are other references throughout the game?