Is this the papercraft after the petey piranha fight and I was wondering when a Video will be uploaded for this, also does this allow you to skip the toad missions in the Village which are required to begin the Goomba fight?

Not 100% sure this is actually something that exist I just saw Really_Tall say something about it on twitter.

It is right after toad in you can watch Nman's PB to see when it is and how to do it.

This is the trick. This is the only consistent way of doing it, and therefore the way used in runs.
The original method discovered didn't save and reload, but instead used a series of clips with solo Paper Mario to reach the Info Centre right next to Mount Brrr. Talking to a Lakitu then made Mario and Luigi reappear. Unfortunately the last clip is ridiculously inconsistent (I got it twice in two hours), so we don't use that method even though it's a couple of minutes faster.