u/5footsmall

I'm probably the last person to realize this BUT since it's the Month of Meh my stupidity can be your gain!

If you don't know which Tophat Gudetamas you are missing, go to the nearest crafting table. The Decorative Gudetamas are in numerical order so you can see which ones you are missing. I was missing about 10 - I used this list: https://hellokittyislandadventure.wiki.gg/wiki/Tophat_Gudetama

If you click on the plan # it will tell you where you can find your missing plans! Happy Snapping!