Not bad at all, though I suppose I should go into more detail than that.
You really like the yyg, don't you? I'm glad you managed to get it a few times, but once people start CCing the yy, or just shielding the glitch, you'll find the time that gets put into getting it starts becoming a hindrance.
In the Falcon match, you airdodged up the to stage at one point when Ness would've grabbed the edge. Don't underestimate his sweetspot range, it's pretty nice. Against Falcon, it looked like you have good combo power, but didn't have the killing power and timing down. Just remember to keep an eye on the opponent's % to know when to shift from combo to kill mode. This weekend I did a sweet kill move on a recovering Falcon. Pk fire his recovery, then bat his sweetspot attempt. He teched right into the fire pillar, which stunned him long enough that ^B didn't grab the ledge. If you work on getting fast fallers off the edge, they become much easier pickings.
With G&W, I noticed you guarded yourself with PK thunder when falling, which is fine, but be careful about him catching on and filling the bucket. I found out how good it is at blocking sweetspots the hard way.
And the final thing I've got is that, in my opinion, you spam fair WAY too much. It's a good move, but it isn't the only move. Mixing things up with a ftilt or nair is a good way to throw an opponent off. But, nice Ness, and I hope you laughed at the G&W a ton for that finish.