Beating Re:CoM makes it so you can hear the Japanese voices in KH2FM's Theater Mode. And you CAN level up in Critical Mode, as long as you don't equip the EXP-Zero.
This discussion again? Argh. I think I'll just try quoting someone with some actual points on it (feel free to disagree with your own points, I honestly don't care):
Give her some role other than the same old "damsel in distress" and I'll be happy, even if it's not something all that drastic. It bothers me how female characters in animes/games are pretty much just the helpless girlfriend that doesn't fight and has to be saved. Some might argue, but I think it would be interesting to see Kairi as a fighter. It might even be an idea for the next KH: Kairi becomes the spellcaster of the team, Riku is the tough one, and Sora is the balanced one. Then there would be other characters with different stats that might provide for a nice team buildup, such as the world specifics, the Birth by Sleep characters (Terra, Aqua and Ven, if they were to appear), the Disney Trio (Mickey, Donald and Goofy) and some others (maybe even Roxas, if they bring him back). If you wanted a party purely of spellcasters, for example, you could choose Kairi/Aqua/Donald as your party. Probably not much of a good idea, but still...
It IS possible, but will require a LOT of work and dedication from both the coders and the ROMHackers (supposing that any of them agree to help). Besides, all letters would be in CAPITAL because the Japanese versions lack the lowercase characters (unless you did further hacking to insert them into the game).
They've been improving models for Final Mix. I remember seeing some images right here on KH-Vids that compared the FM models to the normal KH2's, and the FM ones really were more detailed and revised.
LOL @ everyone saying that suicide is an "easy" way out. Killing yourself is not easy at all, especially since your natural self will try to keep you alive no matter what.