Hardest Undertale Fights

HamThatRoasts

The Top Ten

1 Sans Sans Sans or Sans the Skeleton is a character in the 2015 RPG Undertale created by Toby Fox. He is a lazy, pun-loving skeleton who is a supporting protagonist in the "pacifist" and "neutral" routes of Undertale, and a heroic antagonist/final boss of the "genocide" route. He is known for his incredibly difficult ...read more.

Undertale sucks. - AaronCoolness

He avoids all your useless attacks. He is the one who knows that you are an anomaly other than flowey, alphys, and Gaster

2 Undyne (Genocide)

Undyne is a fish who appeared in the 2015 RPG Undertale made by Toby Fox. When you take the Geoncide route she gets angry that you kill all of her friends and instead of fighting normal Undyne you have to fight a way harder version. The reason this fight is hard is because her spears fly at you really fast and they have hundreds of various patterns.

3 Asgore Asgore Asgore Dreemurr is a boss monster and the king of the monsters in the 2015 RPG Undertale made by Toby Fox. Asgore is the portrayed main antagonist who plans to acquire seven human souls and use their power to break the barrier that seals the monsters underground . Aspects of his character are hinted ...read more.
4 Omega Flowey

How is he lower than Asgore?

5 Asriel Dreemurr Asriel Dreemurr Asriel Dreemurr is a character from the 2015 game "Undertale". He was created by Toby Fox. ...read more.
6 Mettaton Mettaton Mettaton is a character in the popular 2015 RPG game, Undertale. He is a robot with a soul built by Dr. Alphys, and is the sole television star of the underground. Mettaton is a popular character in the fanbase. His notable features include his legs, and his catchphrase "OH YESSSS!"
7 Undyne (Pacifist) Undyne (Pacifist) Undyne is a main character in Toby Fox's 2016 RPG, Undertale. She is the heroic fishlike captain of the Royal Guard, who takes it upon herself to protect the monsters of the Underground. Her name is derived from the word "Undine", and is a pun on the word "Undying". Her most loved monsters are her mentor, ...read more.
8 Muffet Muffet
9 Lemon Bread
10 Dummy V 1 Comment

The Contenders

11 Alphys NEO Alphys NEO
12 Jerry

I rage quit Undertale for 1 month after losing to Jerry 70 times. I was playing Undertale for 3 hours trying to beat Jerry. I have now come back to Undertale on a genocide route and I am stuck on Mettaton NEO.

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