That One Boss
Anyone who has played a video game has encountered this boss. One that you attempt again and again (and again) and yet still fail to beat them. Next you go on the internet to see if there is some strategy you are missing out on.
Once you get there, instead of solutions, you find other gamers wondering the same thing you are: How do I beat that one boss?
Some bosses (like most of the ones in Final Fantasy V) have a game breaking attack that makes them into mice meat. In other cases, a boss may have a fatal weakness that one would never think to try. These are not the types of bosses I am describing. I am talking about fights that no matter what you do, they are much harder than anything else up until that point as well as anything after.
Many of these bosses have unfair advantages against you to such an extreme that it is no longer skill to kill the boss, but good old fashioned luck that stands between victory and defeat. Even on repeat playthroughs, these are the bosses that still have a chance (a good chance) of making you see the game over screen.
Some of the grandest examples of luck based mission bosses include Ozma in Final Fantasy 9, (who in my opinion may be the hardest video game boss ever made.) Xaldin in Kingdom Hearts, and pictured above to induce nightmares, The Boost Guardian from Metroid Prime Echoes. These are the fights that to this day forums still have threads complaining about them. These are the bosses that will ensure you spend some quantity time with the game over screen.
For those of you reading this, if you think of some prime examples of this type of boss, post about your experience below. Discussions are good, especially on topics such as these.