Time for Kirby...
Many players think Wolf has the advantage which simply isn't true.
Kirby forums say (a while ago at least) that it's around 50:50
It's true that Wolf wins in speed and range and is also better at finishing (lol at Kirbys weight...) but that's only one side...
I'm pretty sure I heard Kirby called a "middleweight" a while back...but I don't really know how heavy he is. He's heavier than Metaknight and lighter than Mario XD
And I wouldn't say he's better at finishing, Kirby's fsmash is O_O
Kirby has some stupid stuff like the Gonzo combo, which is basically 50% dmg, which sucks. Also his Edgeguarding is sick and for a change not spikable with your forward B...
The Gonzo combo: fthrow->uair->fthrow->uair, followed by possibly an fsmash, ftilt, dash attack, or something.
BUT!
I always thought it was inescapable, but time and time again I've seen good Wolf players stop me from getting the second grab by spamming Reflector as soon as I can. The only way I thought of getting around that was to shield the reflector, and then grab, but I haven't done it enough times to see if I can guarantee to get the second grab after shielding.
Wolf can outspace Kirby and finish him early but Kirby has always an option too, in every situation. So Wolf has more advantages but Kirbys advantages are more influental on the match-up, making this one - summa sumarum a neutral match-up...
Discuss
First I'd like to rant by saying that campy Wolfs that spam dsmash, fsmash, and blaster are nearly unbeatable online.
</rant>
Ok, offline discussion!
Kirby has his throw combos at low percentages to rack up damage. fthrow->uair and dthrow->utilt.
Utilt juggles Wolf amazingly at low percentages by itself. Watch out for it, I've seen it countered with Reflector.
Wolf has a horrible recovery, and (the up B) is easy to gimp with dair. Kirby can wall of pain you far enough away so that you can't make it back. He can also edgeguard your side B by turning into a stone, watch out for that.
Stealing Wolf's blaster is amazingly useful for Kirby, so try to avoid getting inhaled, or if he gets your power, be prepared to reflect or shield.
Kirby's Final Cutter is very laggy upon landing, so it's easy to punish. If he is far away, reflecting it is pointless, as the projectile wave dissipates long before it reaches him. If he is almost right next to you as he uses it, you can reflect and hit him with the wave, but it's better to powershield it and punish him with a grab or other attack.
Watch out, of course, for Kirbycide. But since Wolf's recovery is so bad, he doesn't have to kamikaze, he can just spit you out under the stage, and possibly kick you around a bit, and you won't make it back up and he will.
That's about all for now, I'll contribute more later if you want.
Why am I helping Wolf, I hate him D:
Edit:
http://www.youtube.com/watch?v=CV-KuyUbq-8
A wifi video of me (a pretty good Kirby) against a pretty good Wolf. I win. I was doing well at first, but he made a nice comeback. It shows you both what to do, and what not to do. Watch out for the end, you don't want that happening to you ^_^