Same level where you first turn into a Froblin. That level has two doodads, one after you leave the cave and one accessible from the same room where you get transformed by using the infinite wall climbing mechanic.
Yup, Jelly Swamp Jamboree, shortly after turning into a Froblin. On the topic of lost doodads, does anyone know where the one of Gnash is? It's the last one I need and I have no idea where to find it.
