the birdo thing utterly baffles me because? in 2018? people are actually more educated about trans people and its no longer acceptable to do crap like youd see in that one smb2 manual and yet. here they are, misgendering birdo, who pretty much is trans, in not only the european version for mta but super mario party TOO apparently. its very upsetting and i wish they just stopped that
Nothing about her design tells us she is originally male. Players who don't read Super Mario Wiki see a pink creature with a ribbon and eyelashes and conclude it's a girl. The baffling part is that the localisation team went out of their way to call her male pronouns, as if to make a statement.
Considering all Birdos wear bows and makeup regardless of sex or gender, that part may just be a cultural thing.
Worth noting is in BS Super Mario USA all three are self-identifying males that just act really feminine, like Vivian in the Japanese version.