Most frustrating, cheapest video game boss you ever beaten?

Final boss in Sudeki was hard. Same for last boss(es), mages, in Divine Divinity.

Bosses from I wanna be the Guy

Sigma an his fucking "ja!, i transfroming!.... again" thing...

most bosses from dark souls.... i hate them

and also the last bosses on cave story... still can't beat the dumbasses

Definitely RAGE.
After that giant boss in the city ruins level i was really excited to finish the game.

All i got was running thru claustrophobic floors fighting dumb AI monkeys.

Dark Fact

Final Fantasy X's Yunalesca. I had to fetch and grind for a good while before facing her. Over, and over again. Anyone who played the game knows exactly why.

The last boss in unreal tournament 3, she always fucking knows exactly when the udamage and shield belt spawn...such bullshit on the hardest difficulty...

Gemon in Dragon Quest VIII, this fucker is basically a boss in a mook's clothing ... so annoying and ridiculously powerful..

The successive no-checkpoint bosses of Cave Story (not counting the optional near impossible ones) were HELL.

Let's not forget, every single boss from Dark Souls, Prince of Persia, The last colossus from Shadow of the Colossus and good old Sephiroth.

Last fight with Carnage in Maximum Carnage for the Super Nintendo.

its either silitha from darksiders, thats an over-sized spider that teleports in a micro second and lands on you smashing you...

or the vizier (last boss) from prince of persia: the two thrones, gay just GAY, i cant even express how gay he is...

super street fighter iv SETH
that guy is just annoying

Heh Anyone ever played Kung Fu Strike?
There comes a stage with two ninja ladies who keep getting multiplied as their health gets lowered.
Took me and my friend in co-op about 1 hour to finally clear that one single stage

Strider swarm of HL2 EP2. I could never get the Magnusson to hit them and used cheats to finally finish the battle.

Probably Exdeath from FFV. I was terribly underleveled and had all the wrong jobs. Took me 2 days to beat him T_T
Cave Story bosses are tough too. And there's a giant bird in the second Prince of Persia game. It's supposed to be an easy boss, but I just couldn't beat it for some reason.

Lost planet: Extreme Condition last boss, annoying as hell, took me many tries to beat him.

Portal 2. Took me a while to figure out what to do. i suk

I'd say Sinistar from the old arcade game of the same name... although Bloody Marie from Skullgirls is a strong contender for this as well.

The most epic boss battle is with Robot from Alice: Madness Returns.

The entire last level of Conan is riddled with cheap deaths. When playing it, I got the feeling that either time or their budget was running out, so they just finished off the level and called it a day. The end boss is filled with undodgeable and unblockable hits for massive damage. So much so, that they stuck a bunch of checkpoints mid-battle. You just have to keep replaying and hope that you get lucky enough to go until the next checkpoint.

The two bosses in Prototype. The first one you have to kill 9 times - very repetitive. The second one has a huge amount of health points and killing him is just a very slow process. Each boss is not really a challenge but it takes up to 30 minutes to kill each of them, which is just annoying chore. Both of them are perfect examples of how not to do a video game boss.

No Nemesis good boss problem is about someone is noob and cant handle oldschool game.

Shao Kahn from Mortal Kombat 2011.It's a miracle I didn't smashed my tv or the controller.

That guy who fight with a microphone at the end of Dead Rising 2. I played with keyboard and didn't know there was a key to dodge. Also I did not understand the thing with fireworks. He gave me a hard time.

Any boss with 'aim for this specific glowing thing while dodging shit I throw at you' is just cheap game design. Not really challenging for the most parts but it's cheap game design and I fucking hate it.