In [[XY138]], Serena saw on the news that the reisdents of Lumiose City were still recovering from injuries and decided to ask Professor Sycamore to help host a Pokémon Showcase event. Serena, Shauna, and even Jessilee put up a collaboration performance which made the residents smile and enjoy themselves. By witnessing how everyone started dancing along and smiling, Serena realized how much she actually loves performing and wants to do more. The next day, after saying goodbye to her mother, Ash asked Serena for a battle after seeing her lost in thoughts. Serena agreed as Ash said by battling, she would be able to decide what's next for her. During the battle, Serena was able to work well with Braixen and use her techniques well against Ash's Pikachu. Ash called off the battle and encouraged Serena that she always has her Pokémon by her side and he would be rooting for her. After the battle, Serena called Palermo, making her final answer to reject Palermo's offer. Serena told her seeing how everyone was smiling during her performance earlier that made her want to travel more and make more people smile like Aria and improve her skills. Palermo advised her to compete in [[Pokémon Contest]]s in [[Hoenn]] and Serena happily agreed.
In [[XY140]], Serena officially left the group to follow Palermo's advice and travel the Hoenn region. At the airport, Serena finally built up the courage to kiss Ash, much to the surprise of Clemont, Bonnie, Pikachu, and Dedenne, and leaving the former momentarily stunned. Serena then thanked him for the journey and his guidance before leaving. She is last seen happily arriving in Hoenn.