Ash, Serena, and Bonnie are continuing their journey to meet Clemont in Lumiose City. Their trip is interrupted when a Pokémon Showcase rehearsal quickly turns into a fight between Fennekin and Pancham. Serena loses her temper and yells at them, and then decides she needs to walk away for a bit.
In town, she meets a familiar-looking girl named Ariana, who tries to cheer Serena up, advising her to smile and inviting her along for some shopping and lunch. When she hears about what happened, Ariana reminds Serena of the close partnership she shares with her Pokémon and suggests that she apologize to them.
After the apology, all is forgiven, and Ariana challenges Serena to a Double Battle. Serena is off to a shaky start, but she remembers Ariana’s advice and connects with her Pokémon. Serena’s fortunes turn around quickly—and Fennekin evolves into Braixen!
Later, our heroes are watching Pokévision when Kalos Queen Aria is introduced...and Serena is amazed when she realizes her new friend Ariana was really Aria in disguise! With her confidence and optimism renewed, Serena leads the way as our heroes set off once more for Lumiose City.