Undertale Discussion Page

Here’s what I think (spoilers, of course):

Gaster was the former royal scientist. Sans and Alphys were his assistants. Gaster’s experiment destroyed him and he became shattered, maybe sort of similar to an amalgamate. Sans is going around trying to collect pieces of Gaster, as a side quest for him. Sans is a Darkner (Deltarune) and in Deltarune he’s the same Sans as in Undertale, Sans can hop around in time and space because of his research and technology. Who knows where Monster Sans is because we’ve never met him, but Darkner Sans is related to (probably the brother of) the short smiley guy in Deltarune (I haven’t actually watched Deltarune yet) and therefore (probably the son of) the weird king Darkner in Deltarune.*

*As to why I think this, I watched a video on YouTube by 2 Left Thumbs with the joke Sans is Sans on it, and so much evidence lines up, from not only Sans’ looks but also things Sans says and does that aligns with that Darkner character and how Sans is defeated in his battle (getting tired and most likely fleeing instead of dying as he doesn’t count as a kill, the fact that he most likely bleeds because Monster Food disappears basically instantly as energy so the ketchup theory doesn’t really hold, and also he needs toilet paper which is unrelated to the battle but yeah, and so much more)! Sans even says he tried to go back

I love Sans, he’s punny but complex and there’s so much to him beneath the surface. Favorite character, easily.