It is the most anticipated event of the year, and as hundreds flock to Crown City to watch the exciting competition unfold, Ash, Pikachu, and his friends encounter a mysterious new Pokemon they have never seen before. But when the three Legendary Pokemon Raikou, Entei, and Suicune suddenly arrive and begin rampaging through the streets, it's up to Ash and his companions, along with their new Pokemon friend Zorua, to uncover the secret behind the immense...

This set of episodes finds tireless Pokémon adventurers Ash and Brock, and Ash's new trainer Dawn, on their way to Eterna City for Ash's next gym battle. After an encounter with a psychic Pokémon, they set off for the Sinnoh Double Battle Tournament. The intrepid trio is ready to use any means necessary to get to the event -- even teleportation! Meanwhile, Hunter J and her pawns conspire to pinch Pokémon.

The story begins when ace private eye Harry Goodman goes mysteriously missing, prompting his 21-year-old son Tim to find out what happened. Aiding in the investigation is Harry's former Pokémon partner, Detective Pikachu: a hilariously wisecracking, adorable super-sleuth who is a puzzlement even to himself. Finding that they are uniquely equipped to communicate with one another, Tim and Pikachu join forces on a thrilling adventure to unravel the...