I've been trying to start a group of Undertale fan pets, and I want to try making Papayas and Snes, but I don't know what pet type they should be

Something that'd be easy for my Chara to wipe out, of course. ;-)

. . .

Nah, like, what's the mood you want to go with when depicting them? Sans could be something Glacier, they're lazy (+ kind of brooding if you want to go with the existential crisis aspect about his character), and then Spectrum and Reborn pets have the amount of energy that Papyrus does!

I think a Glacier Bumbus would work great for Sans, or a glacier harvester for a genocide run sans. Iunno about Papyrus though. I agree that something spectrum would be cool.

For some reason, I'm thinking a Chibi Ghostly for Papyrus! Spectrum Warador could also be a lot of fun, and it has the gloves and lanky look.