This is my first post. I found a glitch that I thought might be useful in all time peice runs.

It is possible to get out of bounds in Mafia Town, Act 6, as seen here. Approach the right side of the chest, and Hat Girl will target the hookshot hook below. Hitting X in the right place will allow you to clip through the wall, and land on top of some iron bars below you. From here, you can turn around, and explore the underside of the level. Be careful, the lava will obviously kill you, and there are invisible floors.

There isn't a ton to do with this, but it may have speed running applications.

I don't think this will be useful, but good find! Is fun to use casually.