Duuuuuude your combo game looks really solid. And in a lot of ways your movement game is really solid, although it could be even better.
The Marth unfortunately seemed to have no idea about how to deal with you, resorting to spammed fairs, counters and fsmashes hoping you would run into them for him (not happening) and leaving himself open to attack. There were also times where it looks like he forgot he can DI, lol. Still, good job sticking it to him and I like the movement with b-reverse bubble but dont get too predictable with bubble in general, I saw times where you would try to bubble and then do it again 4 or 5 more times within the next 12 or so seconds. Btw, water gun is pretty good against Marth imo, but only if they approach (this one rarely did).
Against the Charizard/ZSS, be careful about trying to land the waterfall kill combo because if you don't hit them you leave yourself pretty open. It's nice to be flashy but when its not even at a % where it's gonna kill sometimes its better to play it safe and back off and instead try to stop them from getting on the ground. You also seem to be using shellsling bubble to approach 50% of the time, which can be a problem once players start finding ways around it. Shellsling nair is a pretty good approach when spaced well; maybe you could work that in to your game.
I've got no comments on the double squirtle JV 4 lol...
The "too much shellsling bubble" gets you in trouble against the Roy, right on his first stocks he gets two grabs+followups off you from punishing it. Also it looks like there are times where you are overusing side-b in bursts as well. Which is fine if your opponent is incapable of adapting to it, but just be aware. I feel like you could use dsmash more, it leads to good combos and even if you hit their sheild it still has pretty low endlag, they'll have to punish it with something fast which makes it somewhat low risk to use in neutral.
Against Fox, the dairs were good. I think anytime you are in a position where you can dair Fox and get the last hit (in the air near him and not moving too fast) that you should do it. Pops him up at higher% and puts enough damage on him to knock him down for easy techchases at lower%. Dair>dsmash (or even dsmash>dair>dsmash) can be pretty significant on fast fallers cuz it does big damage and then sets up into a variety of other juggle options.
When you get a lead against Ganon you can afford to be a little careful. I can tell you like to play aggressive which is fine but wrecklessly shellslinging bubbles and side-bs against a powerful character like him can get you punished hard, and it does a couple of times. There's no way this MU should be close at all if you aren't geting outplayed hard by the Ganon. I also noticed during this match that you have a habit of shell shift dancing for an extended time before going for a surprise hydroplane usmash. It might be a better mixup to at times just go for it, or at least throw in baits throughout the match by doing this extended SS dancing *without* having it always end with you hydroplane usmashing.
That's all I have time for now. But yea, they should just make a highlight video of the tournament and have it be nothing but your combos cuz you kinda wrecked lol.