They're matching

Wanted to put all the main character sprites under one roof for my Undertale x Mario series because I really liked all of them

Dawnside (Mockup)

Here's a big monster sprite I did for an Undertale AU (with and without a sweater)

Happy 1 Year of SHY PAL: GOING UP (kinda)

Rock On! ~ Royal Guards

Whatever. Go my Undertale AU's Mad Dummy and the Dummylings

All TWISTED WILL: A GREAT TALE!!! (My Undertale AU) overworld sprites for the shopkeepers

I'll never actually show what happens with Chara, Asgore and Toriel "solving things out" deal after Chara's Hangout in Twisted Will (my Undertale AU), but I like to imagine this is the very first thing that happens

The place where all the underground's detective hang around in The "Detective Agency Department"