So this player Nunu has been fairly dominant in our scene lately. He's third on our current PR and he's even broken our so-called "curse" (where only one of two players have ever gotten first at our locals for the past year). And in the first two sets I played against him, I dominantly took the matches using only Ganondorf, taking his Fox and Diddy with relative ease. But at an event last week, he went Sheik against me and finally took a set off me.
This is one of my better matches on stream and one I'm definitely looking for feedback on. I'd like some advice on the Sheik MU and my play in general.
Your Ganon is pretty solid. Overall, you played well; there weren't any glaring flaws that I could see.
In terms of the Sheik MU, be careful where you're airdodging. I noticed you airdodged to the ground a lot, and used it to try escaping combos quite often. Granted, your opponent didn't seem to read your airdodges many times, so it could've been you just playing properly against your opponent's playstyle.
Also, Ganon has decent tools to edgeguard Sheik. When Sheik is offstage, go for an instant ledge snap (the input used to trump an opponent). You can catch her Down-B with a ledgedrop U-air, and 2-frame her Up-B with a ledgedrop to DJ N-air (at least, those are my preferred options, though others work as well).
When you get grabbed, DI up and away, especially near the ledge. If you DI in, Sheik can get a U-air at kill %s from F-throw and Down-B from B-throw.
Lastly, if you do get a Flame Choke, remeber that you can get a Jab only if Shiek tries getup attack. It will whiff upon Sheik choosing roll towards or away, but if Sheik rolls in you can still get a guaranteed D-tilt or F-tilt (i.e. Jab, then F-tilt or D-tilt right after).