Pokemon Chapter Book 18 Ash Ketchum Pokemon Detective - Pokemon Author:Tracey West Is a Pokémon lost, missing, or acting strange? Ash Ketchum, professional Pokémon investigator is on the case. With the help of his friends and trusty sidekick Pikachu, Ash helps solve mysteries involving some brand-new Pokémon like HootHoot, Spinarach, and Stantler.