@vaporeon_ japan does not have gendered pronouns but the english translations use "he". mostly in japan Kirby has been portrayed as ambiguous or perhaps fluid, and Sakurai has never given an exact gender, but has also used language in one game that is usually said by mascs.
@vaporeon_ canonically Kirby is a lovecraftian god that was supposed to consume the entire universe but was given food as a baby by kind individuals and that has kept Kirby from eating everybody