Perhaps it's more likely that it simply hasn't been discovered, considering Alphys and previous royal scientists never had to experiment with it, as there was no barrier to break.
I wonder if that's what's inside that bunker door in the town. Humans
Nope, when you save it talks about light shining in you instead.
Which is in itself a sort of parallel, in Undertale, your power as a human came from your determination, which monsters lack, and in Deltarune your power as a lightner comes from light, which Darkners lack.
Apperently the royal coat rack will actualy acknowledge the fact that you took the ragger before talking to him
He acknowledges a lot of things, like if you throw it away as well.
I don't like this new joke
https://files.facepunch.com/forum/upload/205984/c7c580bd-ec5e-481c-b834-4479c185f873/image.png