What about when she was teamed with Ash? (Ash's Snivy is a GIRL by the way)
Huh I didn't even know that happened xD I should go check it out!
Yeah. Ash caught her in the 7th(?) episode of the Black and White anime (Snivy Plays Hard to Catch!). She was revealed to have known the move Attract (which pretty much temporarily immobilizes Pokemon of the opposite gender with love) when she used it on Ash's Pikachu, Oshawott, and Tepig, who were confirmed to be male via said move (because Pikachu was already known to be male and if he was affected along with Oshawott and Tepig, they were the same gender). Only six episodes later in the 13th(?) episode (Minccino--Neat and Tidy), she was brought out to battle a wild Minccino in an attempt to catch the little chinchilla. She used Attract, and guess what happened? (hint: not what you might think) The Minccino dodged Attract, and then, to the dismay and surprise of Snivy (and the rest of the gang--Iris, Cilan, and at the time Bianca), guess what the Minccino did?