character_art in Undertale Fan Art Club
METTATON Deus Ex Machina
This is a mockup of a betrayal route Mettaton fight if you don't follow Metta's plans.
This probably won't be in the first version that comes out, but most likely in a future update.
Dogamy & Dogaressa Jr. (14x18 px excluding the white outline)
Posting it a bit earlier today because I'll be busy later
Lesser Dog Jr. (14x18 px excluding the white outline)
Doggo Jr. (13x21 px excluding the white outline)
Drunk Bun Jr. (12x14 px excluding the white outline)
The eyes were hard to re-create at half of the sprites normal size, so excuse the simplification...
I'm not sure I'll use all of these, but here's a look at all the canon character overworld sprites.
Some characters have been resprited since the last time you saw their battle sprites btw.
4
2
1
Rabbit Girl & Cinnamon Jr. (15x21 px excluding the white outline)
Undertale - Tears in the Rain.
[Neutral run]
+Reference.
As far as I'm concerned, this is the most fanon Sans.