Oh, by the way spazz I wrote your critique early so I'll just do some copy pasting.
Okay, here goes spazz.
Coming up from the edge, I noticed you tended to do a flipkick and land on the ground with tons of lag. It rarely hits, and is easily punishible, so don't do that. Also, dsmash doesn't work as something to just throw out there when you're opponent is right next to you-it has too much startup lag. utilt works very well in this respect, especially after spot-dodging an attack. Also, ZSS arguably has the best aerial game in SSBB, so definitely capitalize on that. Good Zamus's need to be expert jugglers, and especially learn how to space the uair, mostly because it out-prioritizes pretty much everything if you space it right. Learn to space plasma whip more towards the tip, to prevent hitting the opponenet in the "dead zone" of the attack.
I'm done.