A Pokémon Champion is the top trainer in a Pokémon League, having defeated all other trainers, including the Elite Four and the Champion's own predecessor. This title signifies mastery in battling and strategy, showcasing a deep understanding of various Pokémon types and their abilities. To become a Champion, trainers must first collect all Gym Badges by defeating Gym Leaders across different regions. Once they have proven their skills, they can challenge the Elite Four, a group of powerful trainers, culminating in a final battle against the current Champion to claim the title.