@Plush2nd Well, Papyrus wouldn't have any real reason to do all that, nor would he reasonably know anything about the Dark.
But Sans, whose brother is trapped down there and who worked with him on the machine he fell into...
...I mean it also could be Papyrus working FOR Sans but idk.
@morkanslil_y Wouldn't him being noticeably happier in the Undertale version be evidence against this theory, if anything?
Though it is VERY weird that he's giving such an uncharacteristically mean look toward them.
@iluv_LiTianchen@esm2e@picrossdressing I've never met someone else who genuinely believes it, though it seems really obvious to me. The TL;DR is that he came from the Undertale world to save Gaster by causing the Roaring and having the heroes Banish him.