IDK but here is the clip:

That's been used in runs for a while now.

So people always in runs have been clipping through the top of the wall from goombas? Huh, never saw that in the wr video.

sorry just really wanted to say something like that, the weird new trick was the fact that if you hit a goomba from under then Mario jumps up and you get to the top

I'm pretty sure it's similar to how coins allow you to floorclip but with entities.

Look great!