I’ve been playing through a lot of Wonder and have seen the animation for elephant Mario going through a door.

It seems like Mario is struggling to get through this door here in this level, it’s a ghost house level where strangely enough you can only enter as with the elephant power up. As well there’s boo’s that bring over tasty treats to eat. Forcibly stuffing them into your mouth if you accidentally touch them. I’m not sure what Nintendo was cooking for this level, but they certainly were cooking.