dunno if this will help, but i got to play mew2king half a dozen times at FCD (all marth vs. doc)
My first official fight w/ him, i got 3 stocked.
2nd fight i got 2 stocked.
then i thought it'd be fun to play him on Mushroom Kingdom 2 and i got 4 stocked, lol. i'm pretty sure all 4 of my stock were taken from 3-5 f.airs into tippers, lol. So don't do that level!!!!! (just in case it wasn't common sense to some of you people, lol)
(although i beat Tope (our 3rd fight, in my 1st pool) vs marth on MK2...so tope's marth probably isn't even considered great)
Me and my Louisiana guys entered the Crew battles, and I fought Mew2King there again. I was just shy of taking 2 stock....and afterward i asked him his thoughts on the matchup. I took note on the things that got me in trouble, and things that worked against him and preprared for one last friendly.
I asked for one last match, and i gave him the best game i had in me. He 1 stock me at high damage. A loss? Not in opinion...i felt pretty **** good after that. but this tourney was a pretty good reality check that it doesn't matter how well i know the matchup, if the marth is just smart and doesn't make mistakes...he's gonna win most the times- no johns, son!
I fought cactuar in my 1st pool, and had a dissapointing loss, 1 and 2 stocked (i think. nobody quote me on that). I thought i could have done alot better...and turns out i did do a lil better than before in our friendlies the next day. He's a cool guy.
um...yea, i guess thats it. I think the most important against marth is to stay out of the air. Pill alot..but only when you know its SAFE. Concentrate on ALOT of dashdashing/wavedash-dancing and feints...and try to lure him into aproaching and outspeed him to the punch when he comes. Cuz in close: marth has no move faster than doc's jab, at a distance: marth has no move faster than doc's f.tilt =)