Some things too work on. First match a lot of up B's and most of them missed, you used them at really random times I guess as a mindgame, but still try to avoid doing that, and only use it in situations when you know it will hit, or else you'll eat damage. After the first match however you stopped using up B at random times, so you fixed it.
You started getting shieldgrabbed a lot during your first stock when you had the lead. Be less predictable with your aerials, and Fireballs as well.
You did well on the third match, until the PK Thunder kill, lol. Nice ending by the way, f-air too good!
Last match, you had an opportunity to gimp him on his first stock, and last stock if you hung on the edge, guess you were playing nice guy. You had a really solid lead but he brought it up, you were being too anxious for a kill imo.
Other then that, I think you played this match-up pretty **** good. I myself have trouble versus Ness (a lot of trouble lol), but I can still help critique...I think xD.