Pokemon XY&Z

Synopsis

After saying farewell to Alain, Mairin, and Sycamore, Ash and the gang arrive at Lumiose Airport. From there, Ash will return to Kanto while Serena will go to Hoenn to enter Pokémon Contests. When the four allow their Pokémon to say goodbye to each other, Dedenne runs off in frustration. Bonnie is able convince Dedenne to return after expressing her desires for the future to everyone. Serena heads to her flight and gives Ash a kiss before boarding and saying goodbye, finally revealing to him how she feels about him. With some time left before Ash's return flight to Kanto, he and Clemont have one last Pokémon battle: Pikachu vs Bunnelby. Ash returns home to Pallet Town, with amazing memories and great friends from his time in Kalos forever etched into his heart.

(Source: Wikipedia)