"Well, I'm sure someone'll disagree, but I'd have to go with the final boss of Terranigma. The advent of the 'save state' feature mad him (somewhat) easier, but before then, he's nearly impossible. Get this, he launches these myriad attacks at you, each doing obscene amounts of damage. Then he launches an attack that is impossible to dodge and drains away half of you hitpoints for a long time, eventually bringing you down to one hit point, regardless of how many hit points you've got, it is also one of the few times that you can hit him.. To top it off, his defense is so high that you can only do 1 or 2 points of damage to him on a hit, so you have to sit their pounding away for a good hour before he finally dies. Oh well, I guess if it were any less difficult I'd be disappointed. "
"What was the final boss in Terranigma? Was it that big mechanical thing? Because if so, leveling up on those floating cube things will quickly make that boss a pushover."
I don't know how to do quotes, so don't kill me. And that boss was Dark Gaia, version two. Pretty easy if you used X guard when he fires off his catastrophe maker and leveled up enought (level 32 or so I think). Also had to go to the back of the room so he'd come close (which is what I hated the most). Loved that game, but I didn't like the final boss music. I like the Dark Gaia music from Illusion of Gaia better.
Personal most hated boss? Zophar. How many hitpoints DOES that guy have anyway? I didn't have triple sword when I first fought him, and didn't win. So I had to go back to an earlier save (which I had TONS of. I must have saved on a different file every hour of play) to go level up on some Chiro Mongrels until I got the tech. As well as the other ultimate techs. Even then, Zophar was one major headache. Still, you gotta love an enemy who is stubborn about dieing. Made getting there all worth it. Wish they had used the Star Dragon theme with the Star Dragon, though. It's such a good song...