Airing November 8th.
TV Tokyo preview translation:
Satoshi and friends have arrived at Soryu City. It's been decided that Iris will battle the Soryu Gym Leader, Shaga, and she's full of fighting spirit. But when she thinks of Shaga, she can't calm down. To calm her mind, Iris climbs the Soryu City's steel tower to vent her frustration. There, she meets her dorm mother from her days at the Soryu Academy and the academy's Axe Jaw Pokemon, Onondo. Through the reunion, new feelings are ignited in Iris.
When it first battled Shaga, Doryuzu closed his heart from Iris as he was opposed to her self-indulgence..... This time, they'll win through their combination! Iris uses her full power and faces Shaga! The Subterrene Pokemon Doryuzu has a revenge battle against the Axe Jaw Pokemon Ononokusu! Just what will happen!?