Buneary lost! Not that it wasn't to be expected, but still, I, and most other people were rooting for her. I know Dawn wasn't going to win the Gym Battle, and it made sense that Ambipom had the only victory, but STILL. That thing needs victories! Though for all we know it could just be suffering from Torchic/Taillow syndrome, where it does pretty much nothing until it evolves and then becomes a God.
And about this Brave Bird thing. Yes Staravia is seen glowing and all that, but did no one notice that it never actually collided with anything? If it doesn't complete the attack with hitting something, how are we to know how powerful it will be and how Staravia will deal with the recoil? Because of this, I don't think it's completely finished learning the attack. It still has to use it in a battle. And as other people have stated, Swellow learned Aerial Ace in a single episode...