Weird. Thought he was a cross-gender balloon or something...
The name of his species is unknown and MANY people think he is the same species as MK, I don't think thats set in stone, its a possibility but its debatable.
I know the anime isn't canon, but it says Kirby (some think its MK) was created by Nightmare, if thats the case, Kirby is a unique species from Nightmare meaning MK isn't his species. And if MK was the one created by Nightmare than Kirby isn't that species. Unless they were both created by Nightmare. There are many sphere-shaped species in the Kirby franchise. Even though the anime isn't canon, its the closest we get (since the games aren't depthy plot-wise) to Kirby and MK's history.
The anime leadz me to believe MK is a pedophile though. All top tiers in Brawl have issues though lol
1. MK = Pedophile, he's gay for Kirbym just watch the anime, he stalks Kirby so much lol
2. Snake = Gay (he wears tights that make his azz noticable...wow)
3. Falco = He and Fox are gay...don't deny it lol
4. Dedede = He's gay (in the anime its hinted LOL)
5. G&W = He's not gay but...he's odd lol, I like G&W
G&W shouldn't be on the list, he isn't gay, but he's top tier so I had to list him for something