Top Ten Undertale Boss Fights

The Top Ten
1 Asriel

It's emotionally awesome. And "Hopes and Dreams" is so far the most different theme for a true final boss, in my opinion.

Simply amazing. Music, effects, everything about the battle is amazing.

Amazing graphics, awesome music, it's a battle to remember!

Difficult,Fun,and Has Awesome Music.Sorry Sans,But Your Way Too Hard and I Prefer Hopes and Dreams to Megalovina.

2 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 boss fight, bad puns, and the phrases "geeetttt dunked on!!!" and "you're gonna have a bad time." He is also named after the font "comic sans." Known for also being Ness from the Mother series. (known as Earthbound in Western territories.)

The music is good, the fight is suprisingly awesome! Sans power and cheats make sense! If you fight an OP character. Why just let them hit you and die? This fight should be on number one

I beat him twice

3 Mettaton Ex

Fun,creative and quirky.The boss is really fun and is overall unique with Mettaton rewinding some of his attacks,and even giving you an essay break where you have to type in what you love most about him.Also,the fight has you use the yellow soul,which I find really fun to use.

4 Flowey Flowey is a flower in the RPG Undertale. He is the first character you meet, and also your best friend.
5 Muffet Muffet is a character from the game Undertale. She appears in a region called Hotland, selling pastries to raise money to rent a heated limo to help the spider clan from the Ruins (who are also raising a bake sale) reunite with the one in Hotland because the spiders can't cross Snowdin.

Hands down the best, I love the music, the character and the purple heart mechanic, it's the best.

I love spiders and tea. What could be better?!

Best song in the game

6 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 at throughout the players journey and his fate at the end of the game is determined by the choices the player has made.

The best in so many ways. The music is brilliant, bar none, except maybe Hopes and Dreams. The realization you cannot spare leads to confusion and desperation that they creators know how to mold, and the atmosphere is empowering. One of my favorite video game boss fights.

By far the most depressing boss fight. You don't want to fight, and neither does he, but he thinks fighting is the only option.

7 Undyne the Undying Undyne is a main character in Toby Fox's 2015 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 Undyne Undyne is a main character in Toby Fox's 2015 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, King Asgore, her best friend, Papyrus, and her love interest, Alphys.

I haven't played undertake and I wish I could, but Undyne the undying (I clicked on the wrong one :[ ) seem to be one of the most challenging other than sans and seems to make you feel the worst about yourself on a genocide run.

9 Alphys NEO
10 Papyrus Papyrus is a character from the 2015 game Undertale, made by Toby Fox. He is the Younger brother of Sans the skeleton, royal guard in training, and a sentry in the town of Snowdin. Opposite to his brother, papyrus is active, loud, and full of himself; but in an endearing way. Papyrus means to become ...read more.
The Contenders
11 Sanneess
12 Toriel Toriel is a goat like monster who is the secondary major character in Toby Fox's 2016 RPG, Undertale. She saves the protagonist from Flowey and guides them through the Ruins, of which she is the self-proclaimed caretaker. She is the ex-wife of Asgore, the mother of Asriel Dreemurr, the adoptive mother of the first human, and the first boss, guarding the end of the Ruins. She tries to protect the human... read more
13 Mettaton NEO

Lol just joking

14 Napstablook Napstablook is a secondary character from Toby Fox's 2016 RPG, Undertale. He is the cousin of Mettaton, who left him in order to become famous. Due to this, poor Blooky has crippling depression.
15 Mad Dummy
16 The Amalgamates
17 Red
18 Dr. Alphys
19 Omega Flowey
20 W. D. Gaster

Gaster boss fight is too overpowered

BAdd New Item