I found something when playing that is surprisingly hard to do with Marth, imo. I would definitely consider this as an advanced technique that requires practice! I shall explain how to do it, and then its practical application. I know the abbreviations for the terms I use, but in the case that the people reading don't, other than attack moves, which everyone should know, I will spell everything out so that I am as clear as possible.
How you do it:
To do this, lets assume you and your enemy are both on Final Destination, your enemy is facing right, and you are ALSO facing right (your back is towards your enemy). 1. Do a short hop. 2. At the same time, do a n-air and then fast fall, what this will do is it will cover marth with hitboxes behind him (in this case, towards your enemy). 3. L-cancel/auto cancel. 4. Pivot, (this is the hard part) there are many ways to do this, but I will list the fastest ways. At this point, make Marth either turn around by moving the analog stick to the left, or, you can do a quick dash dance to turn him around. The timing is really hard to do, but this is worth it. 5. Do another short hop L-cancel/auto cancel n-air.
Practical application:
Lets assume we are in the same situation I was talking about earlier. You are in the neutral game and just trying to feel out your opponent/wait for them to approach/do something stupid. When you do this technique, it covers two scenarios, 1. If your enemy decides to approach, when you do the first n-air, you might hit the enemy if they get too close. 2. When your enemy sees the first n-air, it might bait them into approaching, in which case, you would pivot and catch them with the second n-air.
