Is Kirby a male or female?

I know what gender Kirby is.

Kirby is Female, because she is pink and has a high-pitched voice and in one of the episodes Kirby dresses up with the friend that's a girl.

she still is a girl because when she fights she does it Dirty and when she sucks in an enemy, she wears a female/male-type costume which means she is a cross dresser.

The light high pitched tone is so obvious "and girly" that can explain why she has empathy towards Meta Knight.

^^^Have you watched the intro of the anime? Let me rephrase the first two lines of the intro. "Kirby,Kirby,Kirby, it's the name you should know. Kirby,Kirby,Kirby, HE'S the star of the show." Also, pink doesn't mean he's a female.