Everybody has that one Final Fantasy enemy that just DRIVES YOU NUTS every time you encounter one. So, which one is it? It doesn't have to be a well-known enemy, just one that pisses you off.

I would have to go with either the EvilMask from FF4 or the Malboro from EVERY FF GAME SINCE 4!!! Those goddamned EvilMasks were a ridiculous pain in the ass because they would cast Wall on themselves AND your entire party, making, ANY kind of magic use a real pain in the ass. And the Malboro's do that godawful "Breath" attack that gives you damn near every status ailment in the game!! Both of them were horrible nightmares to deal with.