Alphys and Undyne

Chara

Misfortune

You obtained an egg

Undertale Sans and Underfell Sans

Underswap is my favorite AU because of cool designs and original concept. And I like how many interesting takes people make, even though I like classic more

SwAP PaPYruS

Original style

Sans and Papyrus

soulswap kris art

Alphys and undyne