Which Undertale Boss Is Harder?

Play the game or watch it on youtube before you read this, pretty sure everyone has already tho. I ALREADY GAVE A SPOILER WARNING NOW ITS YOUR FAULT IF ANYTHING HAPPENS!

Im using the starry night theme, btw. Anyway on to the question, which boss do you think is the hardest in the popular game Undertale? We're talking genocide and passive. Not gonna lie it takes a hour or longer depending on the boss and there move set, by far i think sans and omega flowey are the hardest, just all of the genocide bosses make me cry if you've played passive.. who knew they could be so powerful.. o~O Post what boss you think is hardest down below, and stuff.. If you just played the game recently i recommend hot water for when you have banged your fists on the desk in rage of death, have a good day everyone.

 

Undyne the undying

 

Thats true, it has the fact she isn't gonna die in the name.

 

I was ok w/ sans because I played a simulator and had all his patterns down but undyne the undying is actually the definition of getting rekt

 

Undyne X Sans X Omega Flowey would be true hell for two reasons...

1. The difficulty
2. The weird as crud ship I just made

 

Undyne. Took me way too many tries.

 

Undyne the undying by far. Asriel was a clusterfuck of particals, but loses points because of the bullshit "0.000000001" health at the end. Omega flowey was also hard, and is THE hardest boss to do a "no hit run" of. Infact, i think its impossible.

 

Omega Flowey IS a bullet hell, but the fact that u can still progress if you die makes it a lot easier imo

 

Omega flower is too easy, Sans got easy after doing it so many times, Undyne the undying is interesting but after a while she gets easy. They are easy once you get in the groove of things.

 

Nothing is impossible.

 

sans is by far the hardest boss in the entire game

 

Undyne the Undying. I tried for 3 hours with no success, so I quit my genocide run and went back to doing pacifist.

 

Muffet, i think i died the most from muffet

 

Just use the bake-sale stuff next time.

 

None of them are really that hard if you play them enough.
Ones I had the most trouble with on my first playthrough were probably Muffet and Mettaton (ex). Muffet's fight is pretty hard at first, but I found getting a rhythm to the music making it much easier. And Mettaton is bullet hell x5.

 

I didn't die once on flowey but ASGORE completely and utterly rekt me
I can't tell you how much I got rekt
I even used the pie ;-;
With flowey all it is is survive and hit flying buttons
But Asgore
Oh god


and also muffet can go die in a hole

 

Why is everyone saying Undyne the Undying is hard? Took me no more than 4 tries to beat her. Sans on the other hand... *shudders*

 

I'd have to agree that Sans is really easy once you've beat him a few times.

The only time I died was on my first and second tries, on his "last" attack :P

I still find Undyne the hardest without the Ballet Shoes (if your accuracy is good lol, the moving spear part was annoying)

mettaton ex is really easy lol