King of hearts
... Either I'm doing something wrong or I can't get the link to work for some reason... Anyway the Japanese version must have Omega's lv at what your average party's level is which is what happenes with every enemy or boss in the game. In the American version though (don't know about others), Omega is at a set level of 100 that cannot be altered in any way. I guess they must've realized he's too easy if not at level 100. I can tell without downloading because at max the lion heart limit can do is about 240,000 damage (8 hit renzokuken followed by 15 or 16 hits of 9999 damage). Omega at 100 has about 1,100,000 hp... yeah, a million. He is the only exception in the game that doesn't follow the "enemies will be at your party's average level" rule. Even Ultimacia, the final boss, follows that rule. I'm not sure about Ultima Weapon though...