I just registered. I was reading through this thread (what the hell was I thinking...) and noticed some things. Things like the gross exaggeration of Mewtwo's power.
I'm not going to get into what M2's power in the movie would translate to in a battle, although I will say that anyone saying his IQ's higher than 200 is full of the rankest bullpoop, as no one's IQ can get that high. Not even because of POWER LEVELS OF PUNY HUMANS CANNOT MATCH reasons, but because statistically that's impossible. 200 is the highest. M2's IQ can only ever top at 200, and then every other living being gets a lower number because of it. Hell, from what I remember from Psychology class, nothing can ever have an IQ of 200 since that would mean that's it's smarter than everything INCLUDING itself (REALITY DOESN'T WORK THAT WAY, IN CASE YOU WERE WONDERING. YOU ARE NOT SMARTER THAN YOURSELF.). That's how IQ works. A better, actually understandable explanation that might prove me stupid can be found here:
http://tvtropes.org/pmwiki/pmwiki.php/Main/YouFailTheIQTest
The following may also help you understand:
http://tvtropes.org/pmwiki/pmwiki.php/Main/YouFailStatisticsForever
Also, M2 is not the strongest PKMN. Nope. Not even talking in-game statwise (He'd be second only to GAWD!!! if we were talking game stats). He is not a god. Demigod might even be stretching it. Mew didn't create life, it just evolved into it. Think of traveling back in time to DINOSAURS!!! and looking around the bushes for a while. You might find some horrible, deformed, vaguely weasel-like thing. The ancestor of all mammals. Mew is kind of like that, only adorable and horrendously powerful. NOT A GOD. Dialga and Palkia can be considered gods. Groudon and Kyogre can be considered gods. Arceus apparently IS God (capital G). Mewtwo? He can do fancy things with weather by thinking about it hard enough. Kyogre's very presence does that. Mewtwo doesn't create oceans and continents; doesn't control time and space. Mewtwo is an atom bomb amongst actual GODS in Pokemon. Powerful, but in the end is a creation, and not the creator. He is not the end-all to Pokemon. He isn't even the end-all to Psychics. Palkia seems to enjoy that spot immensely. Mewtwo can be defeated in his own world; any world in which he appears.
AND ON THAT NOTE... having variable sources from which fans can draw powers makes things stupid really quick.
I like how people throw out statements like "LOL MYUUTSUU AM GOD BECAUSE OF X THING HE DOES IN GAME, AND Y THING HE DOES IN ANIMU, AND Z THING HE DOES IN MOVIE, AND IT'S ALL CANON"
What's canon?
No really. What's canon? The movies, the anime, the game, the manga? Which one overrides the rest? From what I've seen, neatly explained here: -
http://bulbapedia.bulbagarden.net/wiki/Canon - the answer is NONE. Unless you're talking terms of what the creator liked, in which case you've got the Special manga (and anyone defending M2 power levels gets shot down really quick when we start talking Special), there is no absolute canon. It's all multiple, mostly exclusive universes. Powers in anime do not correspond to M2's in games and manga and vice versa. Apparently, the movies aren't even canon to the anime, since they're all almost always (ALLITERATION) purely speculative. So the M2 in the movies isn't even the same as the one in the anime. And all the M2's vary in power. Game M2 is very powerful, but not a god-like being. Anime M2 is quite stronger than game M2. Movie M2 is the one that can be considered a demigod, as he seems to have great, nearly involuntary, control over his immediate environment. Movie M2 also comes with the greatest emotional (read: Distracting) load, since the poor guy goes on a rampage because he is an artificial being and not a being made by God (HA! HA! Japanese overrides English canon. This is stuff I've merely HEARD by the by, so I might be wrong on some/all details of the Japanese first movie), and seeks to prove that he is just as good as Daddy, who is apparently an arrogant little pink jerkwad. Manga M2 I believe only shows up in Special. This is where he gets depowered something awful. M2 gets his gigantic purple tail handed to him by a group of Dragonite (their Hyper Beams can destroy large parts of a city in this. Make of it what you will.). During the aforementioned dragon-ownage period, he was caught by Red in a Master Ball (didn't just say NTY and kill Red) and later found to be bound to Blaine in such a way that they couldn't be separated more than a few meters without both dying. Also, Mewtwo fought the dragons with a giant spoon, so that's pretty rad. Later, Entei cures Mewtwo (at least proving that Entei is stronger at some things, mainly HEALING, than M2) and frees him from the psychic death bond to Blaine. He takes this opportunity to go KTHXBAI. He returns later to mess up Deoxys. That was actually a fights, so Manga M2 at his strongest has difficulty dealing with a shapeshifting alien. It might have had something to with Giovanni trying to kill Red at the same time, though. So yeah, the Movie Mewtwo is strongest, but comes at the price of being the most easily manipulated and mentally weak (Mew just kinda trolled him into raging in the movie, so talking can still affect M2). Manga M2 is the one closest to whatever anyone considers canon (there's still no absolute canon though), but is the weakest. Game M2 has nothing to do with any of them. You get the picture.
So choose a Mewtwo, because making a delicious M2 casserole doesn't fly. He should get one canon to choose from. In whatever case, HE IS NOT A GOD, AND HAS VERY EXPLOITABLE WEAKNESSES. Ness has an advantage over Movie version, since we all know how annoying 12-year-olds can be, or however old he is. Manga version gets a kick-butt spoon to duel with. But they exist in different continuities, so they aren't the same.
As a response to "random dude what stated that Ness has never fought something stronger than M2"... uhh... M2 ain't a god. He CANNOT destroy a planet. Giygas CAN. Ness lasts really long against that being before dropping the Idiot Ball (or rather, the player stops being a tardicus and tries the most useless attack a few times) and unleashing the EB equivalent of a Spirit Bomb. Also, at his strongest, NESS IS A ROBOT. So yeah. Be better at things than a psychic, time-traveling, Cthulhu-punching ROBOT, Mewtwo. I dare ya.
I didn't bring out the WALL OF TEXT stick on Ness because I haven't read the manga...
I'm hungry.
.