Here a rundown of all the info I have made so far.

Basically a quick run-down he's a bounty hunter in the undertale multiverses or whatever you what to call it. He can use a variety of weapons and tools is main weapon is revolvers. More bellow

funny joke reskin i made this days ago but never uploaded

joke trio (not cannon)

Huh

By the way this would be the worst fight because mainly of deadeye sans

Undertale, but nothing's wrong.

Undertale Dark Reflection art

Asgore crying sad clash royale emote

By AntO the Clownest

huh that's a lot of sans

Orion Constellation Twelve-tone.

Toby?

Hello there, I'm coming back...or not?

Found the background I needed

Spitter resource is really good

https://www.spriters-resource.com/pc_computer/undertale/