Item description:

Here is a Jigglypuff that "never" sleeps. It uses permanent marker to make it look awake. The other Puffs have joined in after a long period of around 7 days.

translation (in the simplest term): You can have one of these skins for that costume specific alt. For example: the 2nd alt's design only works on the 2nd alt. You can include this in your own modpack only if you give credit to the author of this skin.

EDIT:
The other puffs have now joined in with their own permanent marker, except for c06, who didn't sleep at all. 
The modded stages shown are Tropical Resort by Munomario777 and a WIP stage I'm working on.