vs Falco
Your fox looks pretty solid, you've got thunder's combo down, pretty creative follow ups with d-tilt, punishing no tech with jab or up smash, good shine spikes as well. Great use of d-tilt overall and shine out of shield.
Maybe (and just maybe) the only thing I'm thinking you could work on abit, is chaingrabs, you can chaingrab falco a lot longer. You almost always up smashed after up throw, which is fine because sometimes you can't get the regrab in time if they full DI away, and you can always tech chase or punish no tech anyway.
vs Marth
Mirin the moonwalks. Also make sure you don't mess up edgehoging him, is a bit tricky because he can't delay his recovery a bit with side B and choose to go on stage or sweetspot, you just have to play marths more often to figure this out. I wouldn't choose to aprach marth from above too often (full hop nair, double jump + random aerial), that's just asking for trouble because he has several options to punish that if he reacts in time some of them up tilt (easiest and combos into more uptilt or a grab), tipper fmash, forward airs might combo you at high %s into dair. The reason you didn't get punished was because that marth was too scared and shielding a lot, he just up tilted you once and didn't really get a hard punish.
Congrats on winning grand finals against viperboy.
https://www.youtube.com/watch?v=Z4corawq3G8&t=10943 S A D B I R D S