could you explain "sans worked with gaster and alphys"?
sans has a bag of popato chisps in his side of the fridge, says he wouldn't rule out there being dogs in the laboratory, and had the lab's dog food bag in his room at one point. he knows about determination, uses gaster blasters, and references "our reports."
in the true pacifist ending, papyrus notes that he didn't know sans and alphys knew each other. alphys immediately starts sweating and sans deflects it with a "doesn't everybody?" and a wink.
and, of course, "WHAT DO YOU TWO THINK"














