Underswap au Undyne and Alphys
basically Colonna had a geno-nightmare and got up to check on her little sister btw Colly is wearing her pyjamas she's not just cosplaying as a cat XD more underbend: thegreatrouge.deviantart...
.:UT:. A Proud Father by kamillyanna on DeviantArt
Sans Equation by Flotts on DeviantArt
I wish this would ACTUALLY happen! The two lazy-bones battling... That'd be AWSOME!
Sans and Papyrus - comic - http://crispy-ghee.tumblr.com/post/131768470466/sure-this-is-a-comic-not-just-a-sketch
Undertale - Underkeep #AU
Flowey and Frisk