I also lost to a pika this weekend at shuffle, lol. Really annoying MU imo, I played vs anther and it was super close, game 3 (and games 2 and 3 went to last stock). I had the same problem with him that I do vs most players, he would stay very close to the ledge, and even though I had center stage almost the entire time, I had almost no pressure because I didn't want to extend all the way to the edge of the stage, and if I did he would generally stuff me with his much quicker hitboxes. Trying to grab pika is a nightmare, and I also found it almost impossible to hit him with anything out of shield. Which pretty much leaves me to try stuffing his approaches, which he wasn't really doing. Got a few nice aerials reading his spot dodge, but it wasn't enough in the end, in part because I couldn't edgeguard him either. I generally covered stage in case he got lazy or messed up, but he's very experienced and sweetspotted to the ledge perfectly every time. A few times when he had to recover from very far away, I grabbed ledge and stood from ledge, and punished his landing onstage, but this isn't possible when he is close enough to zip far into stage. Also if you try to punish the sweetspot and whiff (and you have basically a 1 frame window to hit the sweetspot), he can instantly uair your lag, flipping you offstage for a free edgeguard (pika edgeguards ganon just as easy as top tiers). So yeah generally quite frustrating, but the set was really intense and good **** to him for adapting.
After the set I asked for any advice. He suggested that for edgeguarding I should condition him to go onstage by taking ledge, then as a mixup, just waveland onstage as he upBs. Because it's very risky for him to go for ledge in that situation, it could lead to a lot of punishes because that way you actually can punish his lag every time. This is generally not worth it vs sheik because she can't go that far, but for pika it probably is. I was also caught trying to act out of my shield a lot (similar to vs link), so I need to discipline myself to not do anything OoS when it's not safe, and learn when that is. Still not sure what the correct approach to the MU is. Perhaps stuffing nairs with jab, and a really heavy bait game, similar to vs fox (except you can't grab in neutral). I was basically trying to wall him out which ultimately didn't work.
I also lost to a campy puff, Amida. I am starting to believe that puff is just as hard or harder for ganon than sheik is, if played right. She can constantly exert pressure without hardly any risk or commitment, and the punishes are so hard and so easy... It's like a floaty falcon. I've also been brainstorming a lot for vs puff, and I have yet to find an answer other than "outplay them really hard, and read their movement and DI like a boss".
In other news, I also got 2nd in teams at Shuffle VII with my teammate 1der, beating teams such as Drephen+Voorhese and Kalamazhu+Fizzle. We lost to Mew2King+Prince Abu, although we took 1 game where M2K tried to B.M. us by going zelda for most of it (DENIED). Overall it was a fun tournament.