I never expected that this day would come: Ash Ketchum and Pikachu are retiring. In an episode of Pokémon set to air in Japan early next year, the iconic duo will conclude their decades-long quest to become the very best Pokémon team in history. (There’s no word yet on when it will air in the U.S.) Two new young heroes will take their place—the first time that Pokémon has changed hands in the entire history of the original series.
For the last 25 years, the perpetual 10-year-old...