Iclim, your Marth still needs a lot of work; he's too stationary. Marth has THE best approach in the game, and you need to take advantage of that. I also think you fought more on knowing what I was going to do rather than Marth's abilities. The thing is I knew that's what you were doing the entire time. All that did was make you look better than you really were. that last match felt like I didn't lose single stock for me.
The biggest problem is you don't know how to approach properly with him, and you aerial game is lacking. You're using the wrong aerials at the wrong times. The only approach option you use is dash, which is the worst thing you could do. His dash attacks doesn't have enough range for that, and it kills his spacing. your sword dance and short hop normal air attacks are much better for his spacing, they have better range, and higher priority.
These things will help your Marth a lot.
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