Slink is introduced in an episode where they’re referred to as ‘he’ by a boy they’re hanging out with (who is no longer their friend) and Slink bullies Buster with that boy, but decides they don’t like doing that sort of thing. Shortly after the fallout with his friend, Slink transfers schools to Arthur’s and joins the Tough Customers, and I have yet to hear anyone gender them. Slink is seen topless in one episode & has a flat chest, but is gendered she/her in the Hebrew translation of the show, which implies there is not a definitive gender written down and known for Slink to the point where it’s confused even by staff! Also, in one episode, Muffy, when talking about The Tough Customers, describes Slink as “downright peculiar”… Another notable thing is it seems like aside from celeb cameos and some rare exceptions, only female Arthur characters have separately colored hair. You can go to the Arthur Wikia to find specific episode information on when Slink was introduced and when they joined The Tough Customers, as well as the source for Slink being gendered differently in different translations!
-quoted from my amazing friend Ava
SLINK IS CANON NONBINARY
SUCK IT BINARIST TRANSPHOBES