Quite few?
Link, Marth, Pikachu, Ike, G&W, Jigglypuff, Kirby, Squirtle, ZSS, Samus, and the list goes on. For someone that's supposedly so broken, he sure is shallow. As the metagame develops, he seems less and less broken but more and more stupid.
The fact being is yes, fair is stupid, yes PKT1 is stupid, but they aren't broken. Giving a slight buff when you eat out the only thing keeping him decent (that also makes him broken because WBR lieks2dothat) isn't going to break him again. Learn the balance, yin and yang. Fractions, what you do to one side you must do to the other, etc., etc.
Now's he's back to the lonely emo kid with psycho-kinetic powers who everyone bullies. <_>;