The Pokémon series is set in a world where humans live alongside creatures known as Pokémon, which can be trained for battles, competitions, and companionship. The story follows Ash Ketchum, a young trainer whose primary goal is to become a Pokémon Master. To pursue this goal, he travels continuously across different regions, participating in Gym battles and Pokémon League tournaments. Throughout his journey, he is accompanied by his Pokémon, most notably Pikachu, who remains his most consistent partner.
As he moves from one region to another, Ash forms close friendships with various companions, including Misty and Brock, who travel with him for periods of time. However, these relationships are typically temporary, as he eventually leaves them behind to continue his journey in new regions. This pattern of travel, competition, and transition defines the central structure of the series, with Ash prioritising his ongoing pursuit of growth and achievement within the Pokémon world.