I Think That Regarding The Ghosts In Particular Itd Make A Lot Of Sense For Them To Be The Ghosts Of

I think that regarding the ghosts in particular itd make a lot of sense for them to be the ghosts of humans, like actual ghosts not just ghost-shaped monsters, that would explain Mettaton's obsession with humans and his want of a more "human" body + we know that ghosts dont work the same way that other monsters do, like being immortal and all.

Also i think its interesting to see the way they cope with being undead beings, depression/sadness from Napstablook, Anger from Mad Dummy and Denial for Mettaton. Something interesting about Mad dummy is that we see that he stops being 'mad' when he gets a corporeal form (genocide run or mew mew kissy cutie) which furthers the idea that they're not whole as ghosts, probably bc thats not what they were originaly

Terrible feeling this has been theorized before buuut I just thought of it and want to make a post so I shall.

Considering the fact that Toriel was pregnant and gave birth to her son, I always assumed there must be some wacky mechanics behind the birth of skeletons.

But monsters may not all operate by the same biology. After all, what makes a monster a monster? Their soul. The Dreemurrs are goats, Undyne is a fish, Alphys is a lizard. We see slimes and glob people and hand face people, all likely with their own origins.

We know Toby to hide lore behind supposed throwaway lines and jokes. What comes to mind is the Papyrus quote, "I think humans must have descended from skeletons."

Obviously the joke being that all humans have a human skeleton. This is where human skeletons come from, which Papyrus adorably seems ignorant to.

Considering this, is it so outlandish to think that Sans and Papyrus may be the undead skeletons of once human forms? I'm not sure what the "animation process" would be, where their monster soul came from, etc. There's the possibility that theres some process in which the human soul of a dead human gets turned into a monster soul and its remaining power is used to animate the subject? I don't know, obviously there are a lot of holes in this theory. But where else would a pair of human skeletons come from than the remains of once living humans?

Also, consider the ghosts. Napstablook, Mettaton, and Mad Mew Mew. Are ghosts born? Or are they the ghost of something once living? Perhaps a human.

Consider the fact that six humans (plus Chara) died in the underground, but at that point we're getting a little off the rails. While I could probably make a good case, I'm not currently convinced that Sans, Papyrus, and the ghosts are the undead forms of the humans.

Please interact with this post. Poke holes, add evidence, tear it to shreds. Obviously the birth of skeletons may not be so deep other than that Toby wanted skeletons in the game and they give birth through plot magic. But I desperately want to hear the fandom's thoughts.