Underfeels 

The best Undertale AU in the entire multiverse.

- Geez, isn't Underfeels incredible?
- Yeah, it really is!

Underfeels by HueHueUrbanBomber October 23, 2017

underfell 

UnderFell is an Alternate Universe created by fans. The main idea of it is everyone is their cruel counterparts, and apparently only wear orange, black, and red.

UnderFell is my favourite AU!

underfell by DepressingVoice16 July 6, 2016

Underfell Papyrus 

The Edgy Angry Alternate Universe Counterpart To Papyrus. He's more popular than that cool skeleton and has all the girls, such as Akari.

Akari stopped as Underfell Papyrus loomed over her, an angry expression on his face as usual

Underfell Papyrus by Rainy Melai October 26, 2017

Underfell 

Overated

Underfell is a overrated sans au

Underfell by Whybeanstastelikepepsi? February 11, 2021

UnderFresh Sans 

He's as fresh as an internet meme lol.

YOLOOOOOOOOOOOO!!!!!!!!!!!!!!! -UnderFresh Sans-

UnderFresh Sans by Dreemurr The Screamer September 3, 2020

underwees 

One's undergarments.

Such as: Tanktop, Bra, Tighty whities, Boxers, and the infamous Panties.

Woah! Did you see her underwees? They are so sexy!

underwees by Some kid who is weirtd October 30, 2017

underfresh 

Just where to begin Damn REMIXES of everything and wtf are them glasses tho

Your as fresh as underfresh

underfresh by Old Chicken Nugets February 1, 2019