User blog comment:Dark Knight 178/Stop giving Genders to Pokemon. It is very Annoying./@comment-26390870-20150518093017

Ivysaur and Jigglypuff are rumoured to be female, while Squirtle, Charizard, and Lucario are generally accepted as male. No clue about Mewtwo. Since there's no definite proof though, I think keeping the pages with "it" is best. Thanks for changing it :)