If the Skeleton is a life state:
What are some unique traits they could have? Maybe the only needs they have are Social and Fun?
Forum Discussion
There was a mention that there are a few different skeletons - but one was a server skeleton if your sims found a certain gold 3 part relic - that your sim can summon to clean your house - so that one appears to be an NPC state - but the others sound like temp states sims can be in. So the answer is both yes and no.
