The species of all the characters have changed. Being changed into objects also works here.
“Caninetale is an AU where all the monsters are dogs and all the humans are cats. Instead of...Caninetale
“SeaTale is an AU that is similar to OceanTale. It is by SonoComic98 in Gamejolt. Sans looks like...SeaTale (SonoComic98)
“Legendtale is an UNDERTALE AU created by Persian. Legendtale is drawn/made in MS Paint, but has...Legendtale