(I'll have to see about streaming it again for Plurk sometime!)

He'll revert back pretty quickly I think, her presence (and whatever the hell happens when she sees him, considering he entirely betrayed her) stomping all over his confidence. Even if she attacks him, I doubt he'll even let his Pokémon defend him, not wanting them to hurt her.
And even though he's learnt how to be angry, he loves her too much to be angry with her.

At least, this is what I expect; RP being RP, I wouldn't be surprised if something else happens entirely. |D