Hmm, I'll point out what I noticed
Some Fox stuff: I noticed you never DI'd Fox's Upthrow anywhere but up. Iirc, Fox's upthrow is weird to DI because you have to DI when he grabs you. It's best to DI behind Fox so he has to work a little harder, then you can mix up DI once he's conditioned. If the fox is too slow on the reaction, you can sideB or dair back to the ground.
The edgeguarding part is, what I feel, the only reason you lost. There were a couple of times where you were at the ledge and you'd commit with a weird nair or simply let him back. You could stand at the ledge and ftilt him or grab ledge and bait out a double jump. By making him burn his double jump, homing attack>fair/nair becomes a lot easier to connect. Also, on Yoshi's Story, as I noticed, you didn't want to go too deep with gimps for risk of killing yourself and opted for spring gimps. The spring is kind of unreliable against Fox imo. Instead, spam homing attack, specifically when fox doesn't have a double jump. The homing attacks will slowly carry him to the bottom of the blast zone. If the Fox knows about this, they'll either attempt to pull you down with them or DI the homing attack up. To avoid trading stocks, just back off when they're off screen and attempt to sweetspot the ledge while leaving behind a spring. You can usually react to firefox not starting up and realize that the Fox has lost his mind. If he DI's up, use your double jump to place a nair/fair on him.
Medz got way more shine spikes than he should have. UpB is rough to sweetspot and too vulnerable when not. I would suggest practicing spinshot>walljump>sideB to mixup your recovery. It works well against opponents holding the ledge, as it can push them off if they're slow to react and end up in an edgeguard or techchase situation for you. Also, Sonic has a pretty good invincible ledgedash.
I still have a love/hate relationship for your usage of dsmash and fsmash. I can't comprehend how it works sometimes. I did like the way you used dsmash against Sanchaz when he recovered above you to put him back offstage. I usually nair or uptilt, but I don't get as big of a payoff. Stealing that. I don't like the dsmashes at the ledge though. Every time i see one miss, I flashback to Shiz vs M2K at ROM.
Anyway, glad to have ya back