It's a liminal space

I feel like Nintendo purposefully made that a rabbit door just so they don't have to put Waluigi in >:(

i had a weirdass fever dream when i was a kid that he would be able to walk through walls and go through that glass princess peach thing as a whole level

(certain walls)

... that is a level.

i know damn well it already is one but for some reason there was a different portrait

idk ask my kid self what was in her head