Without a doubt, Ash's closest companion throughout his journey was Brock. Brock appears in over 500 episodes of the Pokémon anime, a feat shared by only Ash, Pikachu, and Team Rocket.

Episode 3 of Pokemon: Aim to Be a Pokemon Master sees Ash and Misty going to a cafe for lunch, and it’s revealed that Brock has become the manager there since they had seen him last. He ...