Most Annoying Video Game Bosses / Levels

[Yugi]

So, what recent game levels/bosses have annoyed Fox lately.

Let's count.

Balore (Castlevania:Aria of Sorrow)
Puppet Master (Castlevania: Dawn of Sorrow)
That goddamm desert place in Super Mario 64 DS (<--)
All of Bevelle (Final Fantasy X)
Mike Tyson (Punch Out)
Kirby And the Amazing Mirror
Inside Jabu Jabu's belly (Zelda Ocarina of Time)
Baron Brixius (Sonny 2)
Hell Wyrm (Final Fantasy XII)

That's all I guess.

[Dudeman]

The vintage Aperture Science levels in the second half of Portal 2. I had to use a guide for at least 5. Probably more.

[blueflower999]

Oh gosh me too. Such a great game, but I stink at its puzzles.

[Dudeman]

It probably would've been worse if they hadn't included Cave Johnson.

"When life gives you lemons, DON'T make lemonade. Make life take the lemons back!"

[blueflower999]

"Get mad! I don't want your dang lemons, what am I supposed to do with these?! Demand to see life's manager! Make life rue the day it thought it could give Cave Johnson lemons! DO YOU KNOW WHO I AM?! I'm the man who's going to burn your house down! ...with the lemons! I'm going to get my engineers to invent a combustible lemon that burns your house down! *COUGH* *COUGH*"

...I know too many of these quotes.

And GLaDOS was all like "Yeah! Yes! Yeah, take the lemons! BURN HIS HOUSE DOWN! Oh, I like this guy!"

[Dudeman]

"All right, this next test involves...trace amounts of time travel. So if you see your future self on the testing track, don't make eye contact. Lab boys say that'll wipe out time. Entirely. Forward and backward. So do both of yourselves a favor and just let that handsome devil go about his business."

Anyways, back on topic, Soda Popinski in Punch-Out!! Wii is HARD. I still haven't beat him on practice mode.

[Yugi]

"All right, this next test involves...trace amounts of time travel. So if you see your future self on the testing track, don't make eye contact. Lab boys say that'll wipe out time. Entirely. Forward and backward. So do both of yourselves a favor and just let that handsome devil go about his business."

Anyways, back on topic, Soda Popinski in Punch-Out!! Wii is HARD. I still haven't beat him on practice mode.

Mike tyson.

Beat him on my first try.

[blueflower999]

Mike tyson.

Beat him on my first try.

I have a hard time believing that 

I know people like 30+ years old who still remember the code to this day

[garlicbananas]

Sephiroth in Kingdom Hearts 1. I don't personally know any who has actually beat him.
Lou in Guitar Hero 3. I can't be the only who played that game here.
When I was 3, Brock.  I refused to use anything but Pikachu and Pidgeotto.  Pikachu got to level 30 by the time I beat him. Yuuuuup.
Final boss of Uncharted 2.  Took. So. Much. Damage.
Red anyone? So much grinding followed by so much satisfaction.
I'm sure I'll think of more later.

[BlackDragonSlayer]

Sephiroth in Kingdom Hearts 1. I don't personally know any who has actually beat him.

When I was 3, Brock.  I refused to use anything but Pikachu and Pidgeotto.  Pikachu got to level 30 by the time I beat him. Yuuuuup.

Red anyone? So much grinding followed by so much satisfaction.

Sephiroth: My older brother beat him, although I never got that far in Kingdom Hearts (I've finished the game, but haven't fought any of the "extra" bosses).

Brock: In Pokemon Yellow, yes...

Red: I beat him with a Typhlosion in Crystal.

[Yugi]

Demyx.

I shouldn't even have to say it.

[FireArrow]

...Primal Dialga.

He was extremely easy for me. My mudkip knew endeavor...

[Pit0010]

I thought the second time you have to kill Scervo in Skyward sword was really annoying and ticked me off sooo much.

Also the second time to kill imprisoned. Those freaking electricity on every stomp. =_=

and for some reason...it takes me forever to kill Mrs. Thwomp in mario and luigi Partners in time...
*lol I'm really bad at leveling up*

[Wolf]

I think the annoying boss I've met is the rock monster in super Mario galaxy on the haunted house galaxy thingy or something. He keeps putting rock pillars so I can't hit him with the exploding boo.

[Dudeman]

Ah, Bouldergeist. He is a bit of a pain (especially with the daredevil challenge). I found him easier when I fought him again in SMG2.