That was really good. :D
The only thing I noticed is that you miss the pivot desynch a lot and end up paying for it. A lot of times, you and Nana would shoot an ice block, which he would jump over and punish. I would try pivoting a fsmash to desynch. Popo will start charging a fsmash while Nana does a dash attack. I think I do this in my vid against Kirk... it would be like a stutter step for Marth. This is a lot less punishable because it's faster and it's better than shooting an ice block from point-blank. I do this a lot when I'm edgeguarding, too, because charging the smash with Popo lets you perfectly time a desynched command with Nana. Besides that, I think you went for grabs the perfect amount of times.