who's the hardest enemy that you've encountered in any of the AC series?

[strawhat_luffy]

EDIT: Oh wait, how could I forget that giant MT in AC2. >_< That bastard took me countless tries to beat.

I hated the next mission after that where you have to face 3 AC's all at once.

now, if we're talking on how hard it is to defeat just one of them, it's pretty easy. all at once is a different story.

if we were going for a lot of enemies all at once, I'd say Marche Au Supplice or w/e the mission was called is the hardest 4 enemies in any AC game.