Alright, I actually had saved the preview of the Wii U version. that has the character reference And also a possibility of how his textures could look.
Wow, I had already tried doing this, but now that I did it again it worked on the hat... As for the stage I'm going to retry.
Edit: Ah, yep. Correcting a simple error I had made and now it worked more or less perfectly!
Not sure if this is the right place to post this, but every time I try to replace a 3D models texture I get some weird glitchy stuff instead.
But using the same method I'm able to replace flat textures Like food or the trees in the second picture.