Nonsense is a ROM hack by Various Authors. Download it here: https://www.smwcentral.net/?p=section&a=details&id=35707
I finally did it. After various weeks of TASing, multiple breaks and not wanting to come back to it, and a couple of file corruptions, my 119 exit TAS of Nonsense is finally complete. This is almost 100%, but not quite. It's collecting all 5 Yoshi coins in 65 out of the 70 levels that have them. 65 will give you the perfect amount to buy all the special world levels without missing any nor having any extra, so basically finding the 5 levels that take the longest to collect all the Yoshi coins. There might be a faster set of levels but this is what I currently went with