Hello, I logged off with a level 26 Nidarina and a level 23 Charmeleon (My starter). I logged back in and my Nidarina, who was in my first slot, became a duplicate Charmander.
My Nidorina had Headbutt, Posion Sting, Double Kick and Bite, I don't remmeber the nature but I believe it was adament. My actually starter Charmander/Charmeleon is in my number two slot.