Scraggy and the Demanding Gothita!

On their way to Driftveil City, Ash & Co. meet up with a trainer who is having trouble with her Gothita. The Gothita takes a liking to Ash's Scraggy so the trainer requests Ash trade it to her. Ash refuses this offer and so the trainer challenges him to a battle, and if he loses, he must trade Scraggy. Will Ash win the battle or will he lose Scraggy?