My least favorite enemy is those spearmen is Dracula X. It's not bad enough that they can send you flying across the room, but they can also stab you from above or below. Stage 6 was impossible because of them.

Now, i jsut want to state that my FAVOURIE boss is Death. He was so challenging that I enjoyed (dispite the frustration) it and would fight him again gladly. Now, those madusa heads sure are annoying, but once you learn their patteren, they become easily avoidable, they can even help you get through short-cuts (cheating =D). The enermys I hate most of all is those acursed axe guards. I hate them so much. They take about ten hits to kill, and they retreat when you get close to them. So you have to get closer to hit them. But wait, there's more. They throw axes in two different ways. Above or below. Below you can jump or hit, but above you gota hit, you can't duck to avoid it.
If you do get hit, you'll have another chance to get hit again on the rebound. You have no way of telling which way it'll throw at. So you gota keep your distance. But wait, you gota get close to kill them becuase they retreat, but when your close, the might attack, and you'll surely get hit! GAH! You can go to hell, axe guards! That is unless Dracula's Castle isn't hell already.

The only enemy that has ever been even slightly annoying for me would have to be the Guardians found outside the reverse clock room in Symphony of the Night. I really dont have any trouble with any Castlevania games. For bosses, it would have to be the Dracula and Death tag battle in Portrait of Ruin. Thats not saying much as I beat it first try.

The only real enemy I had big trouble with was the Medusa Heads, in their pattern it is really hard to get past them without getting hit a few times.

The Medusa heads,the bats and the skeletons are so f***ing annoying!Yes I know about the swearing rule but they are so annoying I just want to let my anger out!

I hate the medusa heads the most, they're just all over the place, and it really gets to you.

Actually, the Medusa heads in the original game weren't that bad to dodge. But when you combine the with jumping to a higher platform, they can frustrate me. I don't think it's necessarily the enemies that make it hard, it's the combination of the enemies and the platforming at certain points.

Excluding Medusa heads, it really depends whether you count Castlevania HD or not... If you do, I hate Decapiclops most. If you don't, I would have to say Imps (if they "possess" you when they hit you like in SotN compared to the ones in Aria of Sorrow who I think are awesome solely on account of their souls).

I REALLY hated those Igors, or Flea men that look like monkie jumping around like ass*****

Very annoying

UGGGHHHH Medusa heads were the worst with really low gear for castlevania:HD. Now I have no problems with them tho.

Skeleton Medalist... Circle of the Moon.

First off, the guy runs away, so you have to have a specific DSS Card Combo to actually get to and kill him. Then, when killing him, he drops something that's just so terrible, it's not really worth it. He drops a ring, a ring, that turns you into a bear tank. The Bear Tank gets killed in one hit, and it's just... not really that good. I hate it.

Medusa Heads! Pissed Me Of In The First Castlevania, Besides Those Knights That Throw Axes.

I think everyone can agree that the most annoying enemy in the Castlevania series were those Da**ed madusa heads. I hated those things. That and the midget guys that would bounce all over the place.