Brock serves as the Gym Leader at the Pewter City Gym and holds the Boulder Badge for the trainers that defeat him in a Pokémon battle. In the Pokémon games, Brock specializes in and only uses Rock-type Pokémon.
In the anime, Brock is originally the Gym Leader of Pewter City Gym, but he decided to follow his dream to become the greatest Pokémon Breeder. After he lost in a match against Ash Ketchum, he quickly gave up his title. He accompanied Ash on his journey for quite some time, all while trying to live up to his goal. He has travelled with Ash from Kanto to Sinnoh. He currently works in Sinnoh as a Pokémon Doctor. He is one of the main characters in the series.
