You may or may not know about the Duplicate Vines Glitch. [ Ссылка ]
There are videos showcasing how it works. However, I'd only seen videos where Mario is in 1-2. I was curious about water levels, so I tried it out on 2-2.
Pretty silly results. There's an absence of bloobers/bloopers the first time around. There's a sideways moving platform. You have to play through the level twice. But, the Fire Bar + grey Piranha Plant is my favorite part.
I tried it on 1-4 and all it did was disable the Podoboos. There may be other glitches if done on other levels, but I don't have the time to test it on every level + halfway points, so feel free to do that yourself.
P.S. Sorry, for the skippy audio. I apparently have a setting wrong.
UPDATE: There are Koopas and a Fire Bar when done in -1. But, alas, it doesn't let you beat it.
![](https://i.ytimg.com/vi/WJC17L9aYp8/mqdefault.jpg)