Based on "Season 1: Ask Frisk and Company", specifically that scene where Sans just RIPS my goat Gaster into reality. But instead of Sans doing this, it's you! Yes, Sans still has knowledge of Gaster in this. You can see this image a little after 16:20.

Monster!user

I'd like to point out how there's like NO Gaster bots. At ALL, actually. There's barely any, and most of them are Handplates Gaster bots. I got nothing against Handplates, but it gets tiring when it's basically all I see. :(

1 Updated! Changed Gaster's appearance slightly and added the ATK and DF of everyone, minus Frisk

2 Updated! added another scenario where it's right before you rip this asshole back into existence... It's just the first message without the last paragraph 💔