A Timeless Encounter!

While training in a forest, Torrcat and Lycanroc's attacks collide. This disturbs the Mythical Pokémon, Celebi, who causes Ash to time travel back many years to where Ash meets a young trainer and his Litten. Back in the present, Professor Burnet finds and old photo of Kukui as a child with his own Litten, which causes Kukui to reminisce. Will Ash manage to get back to his own time?