So, for my first attempt, I tried to see if copying some code from a different mod and replacing stuff in the distribution would work. This failed.

Bug: Plushies are upside down when attached to backpacks (authentic Z upgraded backpack)
This might mean that they're upside down in other places too. Thought I'd mention it.

I'm going to try using Authentic Z distribution code as a base later. One thing I want to note is that you should separate the plushies from the clothing in the items. I dunno if it changes anything but it would definitely help with making things more organized and easier to read through and update with more scugs. It might even be important? I dunno I'll be honest I'm not great with pz modding so I'm one HELL of a person to be talking.

Also another suggestion, make the crafting recipies have a higher level requirement and make them use the medical cotton balls as a stuffing. Also make them use ripped sheets and twine maybe, instead of leather. Thread makes sense. Apologies if I'm rambling a lot, looking at code for hours makes my head do flips.

Will do more testing later.