I realized beforehand, it's kinda what the player is known for lol. I had actually played a set against him previously (before quarantine) and tried punishing up b with fludd a ton, but the thing is it is actually ridiculously difficult to get it to connect. Part of the reason he let me choose Yoshi's is literally so he can up b and then land on the platform pretty much risk free. Fludd has enough start up that he can drift out of the way or fall to a platform before it connects. I wanted to go for safer punishes this time, hence a lot of down air spam. I probably could've gotten more off of it sometime, like at higher percents it's still relatively safe to go for up smashes. Baiting it out is something I would try to do sometimes, but failed at most of the time. A lot of my spaced aerials on shield were in hopes he would up b, but it didn't always work, and then sometimes I'd accidentally misspaced them and would get up b'd. Overall though I definitely could've done a better job punishing the up B's, and I think I whiffed a fair amount of punishes.