Um yea. Kirby vs Ness, it's a matchup full of spacing and cuteness. I think most everything has been covered about the matchup so far. Ness's fair and Kirby's bair are both godly w/ ness''s being only slightly better in terms of it's ability to beat our kirby's bair. Kirby has to really space his bair in order to beat Ness's fair. Kirby can definitely kill lower for the most part but Ness can easily get an early kill on kirby w/ an uair. uair is VERY strong and even stronger against kirby cause he's a puffball and vulnerable to being sent skyward i guess(cause he's so floaty). of course there's always pkt2 but you can't always count on that for kills, especially against wary players, so i'm not going to factor it in a whole lot. Also Sage, fthrow to pkthunder does 19%, pretty decent. It's not hard to harass kirby players w/ pk thunder but it's definitely not something that's going to force them to approach.
As far as approaching goes, i think ness can approach kirby fairly well, so it's not necessary to play a purely defensive game, although that works as well. Whenever a kirby uses stone, in my mind I see him as being in a vulnerable position because you can definitely land an uair, nair, or bair as he's coming out of it. ness will beat any ariel that kirby tries to throw out every single time if you are quick enough.
Concerning the kirbycide and getting gimped while trying to recover....just don't. if he's near the edge don't go near him, just harrass w/ a projectile. If you are moving through the air smartly and using your ariels well you should NEVER get gimped by a kirby when trying to recover.
sooo, before i write down too many randoms things about the matchup, i think that it's 50/50 (this is assuming that both charcters know the matchup and the spacing). It's 50/50 because they both don't have trouble killing and juggling the other. The both have many options and tricks up their sleeves.
As a side note i find it funny that ness's power is effectively the most useless power for kirby to take in the game haha. (psi magnet anyone?)
here's a vid 4 the heck of it w/ me vs that nub twilight at a tournament last month <3
http://www.youtube.com/watch?v=1Nm0hiZlfMY