How to get a skin "Skeleton" (BAG) (Grounded)
Cooking:
a.) Mask from acorn in the fast access slot.
b.) The state of health should be almost zero.
Actions:
1) Rise on a hill (from where you can die)
2.1) Stay and jump immediately
2.2) When landing/death put on a mask (should be "zin" as in the video)
3) Wait for the screen and load into your save.
There should be a window of character selection (if not - then start again)
4) Push "Esc" and Save and Load.
You're a skeleton!
I've been able to become a skeleton three times out of four.
Grounded 0.1.0.2168 Rel
All the actions you do at your own risk...
You can lose your progress in the game or even "break" the game ...