Ness (and Lucas) need the same hitstun as everyone else. Adding that unnecessary content in Brawl was not just a waste of time, it made both characters much worse.
While we're at it, make Ness' PK Thunder launch him about 3-4 times as far (I'm not joking), have his helpless state afterwards not as long. Actually, get ride of it entirely, minus 1-5 frames. Quite frankly, as it is, PK Thunder is risky. So, to counter its' riskiness, give it a giant reward.
Also, give Ness more grab range, make his aerials all combo better, give him his Smash 64/Project M down smash, make PK Fire not go downward (and awful), make PK Flash go much farther much more quickly, give his Yo-Yo a tad more range, make his down tilt either a new move or go farther, and give his down B the pre and post lag of a shine.
Pretty much if what I said happened, Ness would be a legend. FUZZ PICKLES SHALL RULE THE EARTH, AND THE ALIENS WILL BE BOUND TO LEAVE!!!