doodles of jackattack14's @virulentswap
...well at least my take on it anyway
After reading the backstory, the toxic ooze that caused this au to be... well, THIS, gave me "paint thinner" vibes.
So we got a bunch of Underswap folk in various forms of degeneration, from looking kinda normal aside from glowing eyes and slight discoloration to full on melting and stretching.
Except for Grillby. He became a living lava lamp.
I even gave these melty goobers names!
Sans - Eriosky (named after the artificial dye, Eriosky blue, used in the coloring of blue raspberry flavored products)
Papyrus - Acid (Named after the various dyes named Acid orange)
Alphys - Tartrazine (Named after Tartrazine, an artificial yellow dye)
Undyne - Malachite (Named after the dye, Malachite green)
Hapstablook - Erythrosine (Named after the artificial pink dye, better known as Red No. 3)
Napstaton - Patentblau (Named after Patent Blue V)
Grillby - Wax
Muffet - Pyoktanin (Named after Crystal violet)
Asgore - Magneson (Named after Azo Violet)
Toriel - Mauveine (Named after one of the first synthetic dyes ever created.)
Riverperson - Vantablack
Asriel - Janus (Named after Janus Green B)
Monster Kid/Temmie - idk