Will I really~ have to look through
every one and give specific critique?
Can I just point out general things and specifics where appropriate please~?
'Kay here I go.
You are literally playing right into Nike's hand. I may be bad at this matchup in particular, but I don't think I have to be good at it to know that you can't just constantly let him have his way. Where you guys playing at Burger King or something, because seriously it didn't look like there was any thought process in your approaches.
There was a reason he was playing excessively defensive, and it's not only because he had the lead, but also because that's where Marth performs best and I'd be willing to bet Nike had you figured before the first match even started. :/
Try to mix-up your approach. By mix-up, I mean throw him off his timing, composure, whatever you have. Make him aware that you aren't going to approach at any particular time. From the looks of it, you would probably see a lot more success if you would do fake-outs via cancels and movement (assuming you have the techskill for that kind of stuff like DDP). It would also especially help you to start going for grabs out of ASCSCs.
That is until he realizes this and starts doing Dolphin Slashes OoS. It'll happen, and by then it will be up to you to be aware of
his mix-ups as well. That is a big chunk of the MU really, because even if you somehow forced him to approach it isn't like you suddenly have more freedom either.
On a similar note, you have trouble recovering and getting back down from a juggle. It's somewhat related to the lack of mix-ups. Let me tell you something, sometimes the safest option isn't always safe. In very extreme cases, you will have to Fair or Dair after having been juggled. Crazy right? Well, considering that he'll be prepared to punish your otherwise singular landing, both Fair and Dair can throw him off balance. Now obviously that's not something you want to rely on but something to consider every so often, as the investment is risky and heavy in consequence... yet rewarded seldom... but that's besides the point though.
You know, speaking of composure, don't lose it. Ever. I don't care if you just got spiked out of a Spin Dash, Spring Jump, or whatever you did to put yourself in that position. The minute you panic and get desperate, you brand your eminent doom in your own blood. If you can figure out your opponent's playstyle you can make a come back... and now I think I'm starting to see why some people from here have said that Marth might be one of Sonic's better high-tier matchups... I can dig.
Uhm BTW if I haven't already said it, improving on your execution would certainly help. Two particular cases of failure to properly act are where you missed a grab from a whiffed Dolphin Slash, and the other being where he killed you with a tipper Uair after you jump-canceled your ASC. Why you went through with the latter, I have no idea but I know that either way, you should not have died right and then. :/ This last tidbit isn't necessarily attributed to the matchup, but something to keep in mind as a player.
... You're gonna have to be damn creative with all this. You get to have the added burden of Nike in particular having the best, possibly diverse Sonic experience anyone could ask for. Every trick in the book he'll know, and you'll have to find a way to make it work
for you.
I have to go eat, and I only felt like commenting on Marth specifically, if you'd like for me to look at the others, just let me know. Also, you have to promise me that you'll
STOP MUTHA-F***IN' D-THROWING! IT IS A TERRIBLE MOVE AND YOU SHOULD FEEL WORSE THAN YOU DO RIGHT NOW BECAUSE HE PUNISHED YOU PROPERLY NEARLY EVERYTIME AND YOU DIDN'T GIVE UP ON THAT MOVE, WHY ARE YOU DOING THIS TO YOURSELF AND MORE/EQUALLY IMPORTANTLY WHY ARE YOU MAKING ME RAGE SO HARD RIGHT NOW WHAT IS THIS I DON'T EVEN OMGWTFBBQNOOBPWNCOPTORS DFUIGBDUIGBDUYGBODUDG.
Nike if you happen to read this, thank you for trying to help out. I wait to see the day where D-Throw is made an obsolete move and Sonics are forced to use better moves. <3