Ash and Iris are fighting in the finals of the Don Battle Tournament Arc, but it's Pikachu vs. Excadrill X_X. I wish it was another Pokemon so we could see a new move or an evolution (Palpitoad and Snivy gained no development whatsoever) but I guess they're setting the stage up for Ash's eight gym badge battle (which should be against Iris).
Also, in the battle after the tournament, Meowth is fired from Team Rocket and travels along with the gang for a bit. Iris comments on how useful and reliable he is, and throws a POKEBALL at Meowth. It wiggles a few times...and then the preview cut off -_-. That's one of the most anticipated episodes of the series for me, and it's only two weeks away.