After the Gym match, Cilan decides that he wants to go back to the subway so he can challenge the Subway Masters Ingo and Emmet in a match by collecting enough stamps. Ash and Iris decide that they want to see the rest of Nimbasa City, so they take another subway train to explore. They go to see the sports arenas, having a tennis match, and then head off to see a Pokémon Musical, before spending time at the amusement park. Ash spots an Axew with a bow on her tail, and they take her with them upon realizing that it has lost its trainer. In the subway, Cilan meets up with a trainer named Erina who says she has lost her Axew. Ash and Iris go back to the trains, when the Axew runs off to someone who she thinks is her trainer, but it is another trainer whose Swadloon is not happy to see Axew. In the fray, Iris's Emolga uses Discharge on everyone in the train car. A subway guard reprimands them after the incident, when Erina's Axew gets an idea to leave a note for Erina by stamping her hand into the stamp ink and then Iris drawing a ferris wheel on a stamp sheet, indicating that they will be waiting at the amusement park. As Cilan and Erina get off a train at the same station, she sees the stamped card and asks Cilan to come with her to the amusement park. Cilan realizes it is the last stamp he needs in order to face the Subway Masters and heads with her. Eventually, Ash and Iris meet up with Cilan and Erina, and Erina is reunited with her Axew. Cilan reveals they went to see Ingo and Emmet to find Ash and Iris, and just as Cilan prepares to hand in his card for his Battle Subway challenge, he realizes he is missing one stamp. However, Erina has the missing stamp, and the Subway Masters allow it to count for Ash and Cilan, to challenge them, in a two-on-two match. Ash sends out Tepig and Cilan sends out Pansage, while Ingo sends out Chandelure and Emmet sends out Eelectross. While Pansage and Tepig give a good fight, Chandelure and Eelectross knock them out. The Subway Ma