Suddenly it struck me when I saw the title again. I have yet to add 3 of my personal favourites to this list. @MrXLink might remember the first one.
The one, the only. Sephiroth from Kingdom Hearts 2. The hours I spend trying to defeat this Boss. The satisfaction of finally beating him. Holy hell, that fight was amazing.
The second one is someone I like to call "eater of my sanity" It´s the one, the only Feral Chaos from Dissidia 012 Final Fantasy. For everyone who doesn´t know that game, it´s a 3D fighter. Not a turn based game at all.
A short history lesson on this boss. If you played the first game and declined the tutorial, you are a level 1 Lightning forced to fight him. I personally think this version of the fight is possible, but I can´t be bothered trying it.
He also is the final optional boss of the game, there is no guide on the internet that doesn´t tell you "Go cheese him, if you don´t wanna gl makeing your strat" and I was that kinda guy who actually beat him without cheesing at all. This fight is so unfair, The game allows you to use 5 chrachters against him. Even with 5 chrachters this fight is insane. He basicly one shots you in case he get´s in a hit. So you basicly have to have a perfect fight against this guy. But just like with Sephiroth, there is a gigantic feeling of satisfaction when you beat him without any cheese strat.
And the final one, probably the craziest one to beat. His name? Pringer X : Poison from disgaea 4 in the land of carnage with max strength enemies.
Yes, a penguin. Why? Look up a youtube vide of this guy and look at his stats. Ever heard of a game having an "Equipment Check" this guy is the ultimate one. This guy is the kinda boss that you walk up to and try to see IF you can deal ANY damage to him. And for the first couple of HUNDREDS of hours you won´t deal any damage to him.
Did I mention there are 8 of him?
(To anyone saying "What´s up with Baal" to be fair, I haven´t fought him yet, the unlock requirements are just insane)