On the way to Nimbasa City, Ash and friends encounter a Beheeyem. After discovering it's secret ability, they decide to try and test it out. Meanwhile, Officer Jenny shows up and reveals that she is investigating the Beheeyem.

Ash and friend finally arrive in Nimbasa City. Before heading to gym they decide to check out the Battle Subway. However, a mysterious event causes the Subway System to halt. They head to the Pokmon Center where strange events begin...