How can you hate a character this cute?
And not that I'm endorsing this but, even if you don't buy the games (which it's pretty easy/cheap to import them) you can, um, ahem...*coughgetcoughthecoughromscoughcough* pretty easily. I just think he's hilarious to watch/play as in the game.
And the Kirby comparison is just that he is a cute little character with stubby arms and legs. Meaning, you don't have to have arms, fingers, toes, and legs to be in Smash. And let me also add that he's been in more games than a lot of those who've appeared in Smash (he has four games)...