No, I did make Ultimate World, shame on you for not knowing! My first tileset upload!

Anyways, Distruct made Just Anotha World (JAW) and I helped him on that one. The reason you mgiht think Distruct made Ultimate Wold is because he made a lvl with it in a battle pack.

Aaanyways, you can always check out the list I put up here in the JCS section, lists all 38 tilesets I made so that you know exactly what I worked on. Too lazy to get a link, go hunt for it if you want