Undertale:Swapped Personalities

This is an Undertale AU, were (in pairs) such as napstablook and mettaton or sans and Papyrus, the personalities are swapped. So for example, Sans is the over-confident puzzle loving skeleton, were as Papyrus is the lazy and layed back skeleton. Get it? Well,if you don't then just look at the pictures and you might understand.
#rpg