>>8747172
>Red didn't know Yellow was a girl at that point though, did he?
Yeah, the only ones who didn't know was him and the Johto Squad who thought Yellow was a boy, everyone else either knew she was a girl, or quickly pegged her as a girl, which makes Misty giving up on Red all the more funnier.
>I don't remember if he ever knows.
He never knew, only at the climactic battle with Pryce did he find out.