Ash Ketchum is officially the number one Pokémon trainer, after becoming the Pokémon World Champion in the Pokémon World Coronation Series. In 1997, Ash Ketchum, a 10-year-old from Pallet Town in the Kanto Region, embarked on a journey to become a Pokémon Master. Twenty five years later, Ash achieved his dream at the Pokémon World Coronation Series when he defeated Leon for the title of World Champion. When did Ash become a World Champion?The Pokémon World Coronation Series is a global event with participants from all regions. Including some of the strongest trainers like Cynthia, Steven, and …