In perhaps one of the absolute weirdest, craziest and funniest video game crossover character-swap parodies (and fanfics in general) ever devised, the rich and colorful world of Undertale meets the batshit-insane, drug-induced and equally colorful worlds of Undertail and Um Jammer Lammy (the genderbent bastard child of Parappa The Rapper) in a story that, just like the original game (in fact, it even retains the same plot), is so fucking insane that by the time you're done with it, you'll have literally no goddamned clue what in the hell you just read. And you are going to love it.

Starring:

Alphys as Lammy Lamb

Undyne as Katy Kat

Gaster as Master Onion

Chara as Teriyaki Yoko

Underfresh Sans as PJ

Papyrus as Fussenpepper

Muffet as Kathy Pillar

Asgore as Chuck

Asriel as Cathy's babies

Nice Cream Guy as Puddle

Toriel as Mooselini

Gerson as Fleaswallow

Temmie as Ma-san