If you asked someone what their favorite Mario game was, most of them would say Super Mario World. But can you blame them? The game is absolutely incredible! All the level, secrets, and memories with the game, makes it one of the best (if not the best) Mario game ever. It's perfect. ...well, almost.
Super Mario World had a lot of issues during development, and it eventually had to be rushed to completion. Because of this, there were some mistakes you may not be aware of in the game. And not only that, there are a TON of scrapped objects, sprites, levels, etc. just waiting to be discussed. And now, it's time to do just that.
Enjoy, my friends!
Sources:
http://shmuplations.com/supermarioworld/
https://www.unseen64.net/2008/04/14/super-mario-world-snes-beta/
http://tcrf.net/Super_Mario_World_(SNES)
http://www.snescentral.com/article.php?id=0000
https://en.wikipedia.org/wiki/Super_Mario_World
http://www.mariowiki.com/List_of_Super_Mario_World_pre-release_and_unused_content
http://tcrf.net/SNES_Test_Program
Video Footage: https://youtu.be/Vxg5eOPmzHI