I at first used Kirby alot because of his "copy" ability. However, as I improved, I found several reasons to like him. If you use the "Stone" move effectively, it makes a VERY strong defense. (In fact, I can use this technique for those who dare to use Jig's Rest on me. You start to do Rest, but I Stone, blocking it completely, I transform back and throw you VERY far. Hehe! Evil counter, huh?
) Just like Jig, he can puff his way back to the stage, and if needed, he can knock away those edge guarders with his hidden sword.
Not to mention, when you master the "puff technique", he can knock away enemies that are trying to get back on.
He can be the most annoying puffball your opponent ever faced when you use him well. (N00bs get really pissed at how easily I beat them with what they would consider a weakling.)
The only other one I've become incredibly skilled with is Pikachu. The double quick attack is plain annoying to the opponent on the verge of knocking you off.
A surprise THUNDER from above can really blast someone into the stratisphere quite frequently when used right. After a while, hot shot n00bs find it VERY annoying.
Ever known anyone else's tail to be an effective weapon? I kill n00bs who think otherwise.
And who can resist an electric headbutt? He probably has the most damaging forward airial attack around.
No wonder so many hate this electric rat. He's annoying when used well.