im very well aware statistically he is the highest but no manga tv show or in game character has stated mega mewtwo to be the strongest. Ghost acreus and steel arceus both end mega mewtwo y and X. why you ask arceus ABILLITY is broken and his STAT distribution mega mew two has no defence and can easily be one shot by a swords dance steel ar ghost arecues.Mega gengar and gardevoir both beat it as well. And ur talking over rall bst total right? mewtwo cant kill a lugia wana know why? hp and mixed defences nothing mewtwo can do will kill it. speed boost blaziken better ability making it beter. Mew? know every move and dose broken stuff with it mew two can only do one job but can't kill anything whos job is to protect against thoughs types of moves why? because mewtwo aint the most powerfull pokemon around. And Mega Mewtwo aint even the best at what he dose since Adaptability special attacking mega lucario is already a better sweeper making mega mewtwo look bad in comparison.
Please work on your english, these walls of text are getting hard to read.
You're throwing out a bunch of hypothetical situations where a pokemon could beat Mega mewtwo, and you're assuming that
1. the opponent has set up but mewtwo hasn't and
2. mewtwo doesn't have any moves but psychic type.
If he used calm mind twice, or nasty plot once, he would tear through just about every pokemon there is. (excluding pokemon with high defenses that cannot effectively attack back regardless) These following situations, i'm not even going to assume he's set up because he doesn't need it.
Mega mewtwo Y can use shadow ball or aura sphere and destroy steel/ghost arceus before it can even use swords dance. Same case for gengar and gardevoir, mewtwo is faster than gardevoir who is very flimsy vs Mewtwo, and he can tank a hit from Gengar and retaliate with an OHKO. (Mega gengar's STAB shadow ball does 77% of Mewtwo's health while Mewtwo's psystrike does 240% of gengar's health.)
BST wise, Mewtwo and lugia have the same hp and Mewtwo has enough attack to annihilate Lugia with thunder, even if Lugia has multiscale, Mewtwo can still take over 10 lugia attacks without fainting and retaliate by 2HKOing lugia.
Lol @ "better" ability, the ability doesn't matter if it can't last one turn against Mewtwo for the ability to activate.
Mew has a terrible bst, and isn't even in ubers because no matter what it can do, there's another pokemon that does it better.
Mewtwo is Worlds better than Mega Lucario at sweeping, Mega lucario is OU, Mewtwo is ubers. Lucario gets OHKO'd by Aura sphere, Mewtwo is faster so Lucario won't even be able to attack.
Do you even know what the pokemon metagame is like?
And also, Anime canon has mega mewtwo Y flying genesect into space in a matter of seconds and pretty much wrecking a downtown area with his battle, not that it matters because this is going by game canon, and the anime has major inconsistencies.