Da rat and the mouse

Aqua from hitgame underrune

Ms paint ralsei

Papyrus and his best friend FLOWERY

Pink! (Mad mew mew)

Under Your Nightmares DAH PAPYRUS

I drew boring stuff like chair

Here chair

(And Toby chair)

The seven eggs for the seven chapters

And here's Flowery & OMEGA FLOWERY in Lastduet. He is Sans's memory about trapped in the timeloop and fell into nihilism.

Flowey the Flower.