"W-well, yeah!" Alphys says as if that's the most obvious explanation in the world. "The last time I saw you, you didn't have half a dozen eyes! Sockets. H-half a dozen eye sockets."

Skeletons.

"You're telling me multiverse theory is for real?" She had always sort of believed in it, because it made her sleep a little better at night imagining there was a timeline out there where she wasn't a colossal failure at everything. Maybe one where Undyne swept her off her feet and pulled a magic sword out of her chest and they lived happily ever after. "...H-how screwed are we talking, anyway? You have a tail."