Yeah side B means you have to be more cautious in using Rock Smash. But you can also punish ZSS if she's careless with her side B. Its easy to powershield and if you do you can run in and grab. Shielding too much can be a problem because ZSS can put enough pressure up to easily shieldstab a big character like Charizard. An aggressive ZSS can be really hard to deal with if you're not used to it. Good powershielding is pretty essential.lol...yeah I figured I was probably playing Charizard vs ZSS all wrong... against the ZSS in my region it was so bad I was relying in Squirtle/Ivy instead of Squirtle/Charizard. As Charizard in this matchup I shield a lot, and use grabs to do most of my damage, with the occasional u-smash. Rock Smash is nowhere near as safe here as it is in most matchups. Between neutral-b, side-b, and one frame jab it's really hard for Zard to get in close.
I wasn't going to bring it up, but I do agree that Squirtle's air game is better than ZSS's overall as well as in this matchup
Flamewar about who has the better air game coming up soon.
