I started a brand new game of Yoshi's Island. There was one thing in particular I wanted to get a screenshot of. At first, I thought I could try a few stages I thought it might be in, but after trying a few dozen stages, I realized I had no idea where it was. So, then I decided to just replay the whole game, trying to get everything.

So far, I got 100% in all the stages of world 1 (including Poochie Ain't Stupid)
I LOOOOOOVE Flying Omelette!!
Crawl and 1000