|Brock in Pokémon Let's Go Pikachu and Pokémon Let's Go Eevee|
Brock is a recurring Gym Leader in the Pokémon series, who prominently appears as a major supporting character in the Pokémon anime series. Brock wanted to be the greatest Pokemon Breeder (he is now following his destiny as a Pokemon Doctor), and gives up his title of Gym Leader after Ash Ketchum won his first Kanto League Gym Badge for him. Brock is the oldest of ten siblings, with five brothers and four sisters, whom he takes care of.
After Ash Ketchum loses to Brock, a stranger offers to help make his Pikachu stronger. Pikachu becomes stronger and manages to defeat Geodude, but Onix remains too strong. Onix has Pikachu in a body bind;
Since then, he travels with Ash Ketchum and Misty on his many adventures. In the Orange Islands series, he leaves the team to join Professor Ivy, but mysteriously returns to Pallet Town when Ash Ketchum wins the Orange League Championship.
By defeating his mother, he restores the Gym's reputation, and proceeds to leave all his Pokemon (except Forretress) to his younger brother Forrest, before departing for the Hoenn region, where he catches up with Ash Ketchum and his two new friends, May and Max. The group travel across Hoenn and then return to Kanto to participate in the Battle Frontier. The group went their separate ways, but Brock later met up again with Ash Ketchum in Sinnoh, where they met a new coordinator named Dawn and her partner Piplup.
During this time, both Brock's father, Flint (who was also Brock's predecessor as Gym Leader), ran off again, and his oldest younger brother Forrest took the role of Gym Leader in Pewter City, as well as the responsibility of caring for his many younger siblings.
In the games
Pokémon Red, Blue, and Green: VC Edition
Brock is the gym leader of Pewter City, using Rock-type Pokémon.
|Geodude||10||Tackle, Defense Curl, Bide|
|Onix||12||Tackle, Screech, Bide|
Pokémon Gold, Silver, and Crystal: VC Edition
In the Generation II games, Brock resumes his role as the Pewter City gym leader.
|Golem||51||None||Earthquake, Rock Slide, Dynamic Punch, Fire Blast|
|Rhydon||51||None||Earthquake, Rock Slide, Dynamic Punch, Stomp|
|Kabutops||52||None||Surf, Rollout, Slash, Giga Drain|
|Omastar||52||None||Surf, Ancient Power, Bite, Blizzard|
|Onix||54||Gold Berry||Earthquake, Rock Slide, Bide, Iron Tail|
- Items: Full Restore (x2), X Defend (x4), Full Heal (x4)
Pokémon FireRed and LeafGreen: VC Edition
In the Generation III games, Brock resumes his role as the Pewter City gym leader.
|Geodude||10||Sturdy||None||Tackle, Defense Curl, Mud Sport, Rock Tomb|
|Onix||12||Sturdy||None||Tackle, Screech, Bind, Rock Tomb|
- Items: Potion (x2), Full Heal (x4)
Pokémon HeartGold and SoulSilver: VC Edition
In the Generation IV games, Brock resumes his role as the Pewter City gym leader. You can also have a rematch with it at the Saffron City fighting dojo.
|Golem||51||Sturdy||None||Rock Slide, Earthquake, Rock Polish, Brick Break|
|Rhydon||51||Lightningrod||None||Rock Slide, Earthquake, Hammer Arm, Stomp|
|Omastar||52||Shell Armor||None||Surf, Ancient Power, Mud Shot, Ice Beam|
|Kabutops||52||Battle Armor||None||Rock Slide, Waterfall, Slash, Aerial Ace|
|Onix||54||Sturdy||Sitrus Berry||Rock Slide, Earthquake, Rock Polish, Iron Tail|
- Items: Full Restore (x2), Full Heal (x4)
|Golem||63||Sturdy||None||Stone Edge, Earthquake, Thunder Punch, Fire Punch|
|Relicanth||63||Rock Head||None||Head Smash, Waterfall, Double-Edge, Earthquake|
|Omastar||63||Shell Armor||None||Surf, Ancient Power, Earth Power, Ice Beam|
|Kabutops||63||Battle Armor||None||Stone Edge, Waterfall, Brick Break, Aerial Ace|
|Rampardos||63||Mold Breaker||None||Stone Edge, Zen Headbutt, Thunder Punch, Earthquake|
|Onix||65||Sturdy||Sitrus Berry||Rock Slide, Earthquake, Rock Polish, Iron Tail|
- Items: Full Restore (x3)
Pokémon Black 2 and White 2: VC Edition
In Generation V, Brock can be battled at the Pokémon World Tournament in Black 2 and White 2. He can be battled in the Kanto Leader Tournament, the Rock-type special tournament, and the World Leaders Tournament. During the tournament, all Pokémon will be set at Level 50. You can battle in a single, double, triple, or rotation battle.
|Onix||Careful||Sturdy||Eviolite||Stone Edge, Dig, Iron Tail, Curse|
|Relicanth||Jolly||Rock Head||Rindo Berry||Head Smash, Waterfall, Bounce, Zen Headbutt|
|Aerodactyl||Jolly||Pressure||Bright Powder||Stone Edge, Aerial Ace, Thunder Fang, Fire Fang|
|Rhyperior||Jolly||Solid Rock||Quick Claw||Stone Edge, Drill Run, Megahorn, Thunder Punch|
|Rampardos||Jolly||Mold Breaker||Scope Lens||Stone Edge, Zen Headbutt, Thunder Punch, Brick Break|
|Tyranitar||Jolly||Sand Stream||Chople Berry||Stone Edge, Crunch, Aerial Ace, Fire Punch|