I was Audino training (at about L30) and then something weird happened.
I rain into a random patch of shaking grass, and I faced Audino. When I went to select what move I wanted to use, I didn't actually use the move, instead the screen describing the move came up? It's the same screen when you're in battle and you go to Pokemon > (choose Pokemon) > Check Moves > (click on move).
My copy of Black 2 is legit; I've never had this happen before.