Brock was born and raised in Pewter City, where he spent his childhood watching his father Flint train in the Pewter Gym. As the eldest of 10 children, Brock inherited the Gym on his 11th birthday. He trained there for many years, before giving the Gym to his younger brother, Forrest. He then went traveling with Ash Ketchum for several years.
The Alexis Saga
Brock first appeared in Best Wishes when he journeyed to Unova after officially becoming a Pokémon Breeder. He joined the group after remeeting with Alexis, deciding to attempt to balance both his skills as a Breeder and a Battler. During his time, he captured a Timburr, Boufallant, Sawk and a Tangrowth.
Tangrowth is a Pokémon caught by Brock. It's a docile Pokémon that is clumsy both in and outside of battle. It likes to care for Brock's other Pokémon, and often tells off those that are mean or naughty.
This listing is of Brock's Pokémon exclusively for his Gym battles: