Listen. Two compete for this spot. Bahamaut from FF3 and Ultimecia from FF8.

3 cause first time you fight him, he is unbeatable. It didn't occur to me to run or anything, I mean, I didn't know at the time. So I fought him. For THIRTY FREAKING MINUTES. Yeah, when I picked Run cause of aggravation and it worked, I didn't pick the game up for another 4 weeks.

8 cause she randomly brings people into the fight. Since every character is a blank slate in 8, I only ever have 3 equipped. Squall, Selphie, and Zell. Well... First time fighting her, guess who she bought in? Yeah, you guessed it. What a .