:16- Should of finished your dancing blade, I dont know why you stopped, perhaps lag.
:21- Dont rely on DDB4 (down dancing blade 4th hit), you can DI out of that and get punished easily. If you really want to use it, use it on heavier opponents.
:38 to :44- You start randomly throwing out aerials instead of retreating and making space, a poorly spaced dtilt gets you grabbed. He leads into a whorenado because you used a fair instead of air dodge to shield.
:51- You missed dancing blade and continued using it into a DDB4. You then got punished. If you miss your dancing blade's first hit, STOP.
:54- Uair to Fsmash both missing, in a matchup vs MK you need to use retreating fairs and dtilts to wall him out of your range. You want to keep him outside of your blade. If he gets inside it, your gonna get *****.
1:08- Bair, to fsmash? You dont use enough fairs and tilts and your letting MK get inside you again.
1:23- Bad, you used a dancing blade in the air. You were too close to attack anyway, should of retreated. I know your probably not used to playing campy with Marth but its needed against MK.
1:36- Ran into his dsmash, you need to stop rushing so much. Its your mentality that is hurting you here.
1:50- Whiffed fsmash = punished. Don't use Marth's fsmash so much. Up b out of your shield is a better option vs MK. Dsmash is good too, but dont spam it.
1:58- Lack of retreating your fairs gets you KO'd. When you fair, use the control stick to DI backwards. It keeps you far safer.
2:12- By staying in the center of the stage and not retreating, you are letting your opponent take advantage of his invincibility frames and attack you for free. Stay away from MK.
2:38- Approached with Short hop double fairs, dont do that ever. Especially vs MK.
2:46- More random aerials and a Fsmash, this is the third or fourth time you did this and got punished.
3:18- Wow that was a predictable fsmash lol, glad you countered it, nice work.
3:40- Good use of platforms, it seems that the MK is giving up.
3:43- You really shouldn't try to edgeguard MK but you were ahead a stock so it wasnt that bad I guess.
Your Marth isn't bad, I would say you are better then that MK. All he really did was tornado and ftilt so yeah. I would use up b out of your shield to help you with finishing opponents. You didn't grab the entire Match. Work on creating walls with fairs instead of randomly throwing out aerials. Do you use the c-stick to use fairs? If you dont I would get accustomed to it, that way you can DI with the control stick at the same time. If you played a better MK you probably would of lost. Mix up your approach and play more defensive and you ll be fine (watch other Marth videos to see what I mean), thanks for posting ^^