Making a FFVI Boss

[K0n9]

So you want a hard boss, huh? Alright, here's something for you to do. If possible, make it so that said boss always has Haste, Regen, Protect, Shell, and Float status, have it counter physical attacks by using an X-Potion and magic attacks with Heartless Angel, and have it absorb Fire, Ice, Lightning, Wind and Water. Give it immunity to Instant Death, Doom, Imp, Silence, Stone, Darkness, and Sleep. And Upon death, it should cast Ultima. Oh, also, if you're using the SNES version, be sure to make it immune to the vanish status, otherwise people can exploit the whole 'Vanish makes every spell hit, no matter what' glitch. How's that for hard? By the way, I'm going off of the GBA version names, they might be a little different in the version you're using. Oh, and also, I don't think it's possible for this boss to be more evil than Kefka. Poisoning a water supply to kill countless innocent women and children, and even some of his own men, just because he's trying to wipe out the enemy, destroying an entire village - other than the children, since their parents sacrificed themselves to save them - just for making him cross.... Hell, he'd probably sit there, killing off almost the whole world, letting it flourish for a while, and then doing the same thing constantly for all of eternity if he hadn't been stopped. He's crazy like that.

I want to make a boss so difficult that he'll be virtually impossible to beat, but NOT over powered.

Does that count as over powered?