Pokémon is a Japanese media franchise managed by The Pokémon Company, a company founded by Nintendo, Game Freak, and Creatures. The franchise was created by Satoshi Tajiri in 1996, and is centered on fictional creatures called "Pokémon". In Pokémon, humans, known as Pokémon Trainers, catch and train Pokémon to battle other Pokémon for sport. All media works within the franchise are set in the Pokémon universe. The English slogan for the franchise is "Gotta Catch ‘Em All!". There are currently 913 Pokémon species.
Ash Ketchum (Japanese: サトシ Satoshi) is the main character of the Pokémon anime. He is also the main character of various manga based on the anime, including The Electric Tale of Pikachu, Ash & Pikachu, and Pocket Monsters Diamond & Pearl. He is a Pokémon Trainer from Pallet Town whose goal is to become a Pokémon Master. His starter Pokémon was a Pikachu that he received from Professor Oak after arriving late at his laboratory. On his journeys around the Pokémon world, he's been accompanied by a multitude of close friends. In Pokémon the Series: Sun & Moon, he becomes the first Champion of the Alola region's Pokémon League. In Pokémon Journeys: The Series, he becomes one of the eight best Trainers in the world within the World Coronation Series.
Gary Oak (Japanese: オーキド・シゲル Shigeru Okido) is Ash Ketchum’s first major rival and a recurring protagonist from Pokémon the Series. He is based on Blue Oak from Pokémon Red and Blue. He appeared as a recurring antagonist in the first series, later becomes one of the supporting characters for the rest of the series. Gary was originally close to Ash when they were younger, though their friendship ended after having an argument over an old Poké Ball and eventually breaking it. After losing to Ash in the first round of the Silver League Conference, the two eventually became friends again altogether.