>>314843471It started on Tumblr with random people claiming it as headcanon. Then someone dug up an old interview from 1994 where a background artist joked that Samus was a shemale, and claimed that it was totally canon proof. Brianna Wu then read that Tumblr post and decided to publish a poorly-researched article on the subject, downplaying the mountain of evidence against Samus being trans while elevating the importance of the "shemale" comment. People believed it and spread it as fact for a while, until they all forgot about it.