Brock is one of the deuragonists in "Pokemon". He is one of Ash's friends along with Misty, then May then Dawn. He is considered "a ladies man" because he flirts with the other girls on the show. He has tan skin, spiky brown hair, an orange shirt, green vest and pants and sneakers; he's voiced by Eric Stuart originally and later by Bill Rogers.
After Ash loses to Brock, a stranger (Brock's father) offers to help make his Pikachu stronger. Pikachu (after being hooked up to a local hydro-power station) becomes stronger and manages to defeat Geodude, but Onix remains too strong. Onix has Pikachu in a body bind; however, Pikachu's previous electric attack ravaged the gym, which set off the sprinklers, weakening his Onix. Ash declines the badge on the grounds that he unfairly beat Brock, but Brock later catches up to him and presents to him the badge, saying that he wants Ash to fulfill his dream of becoming the best. The stranger that first helped Ash reveals himself to be Brock's father, Flint, who has a tendency to not notify people it is him. Brock is now free to train himself, and joins Ash and Misty on their journey.
Since then, he travels with Ash and Misty on his many adventures. In the Orange Islands series, he leaves the team to join Professor Felina Ivy, but mysteriously returns to Pallet Town when Ash wins the Orange League Championship. When asked what happened, Brock just rolled up into a ball and replied: "I don't wanna talk about it." or "Don't mention that name." every time someone mentions Professor Ivy. Rejoining Ash and Misty, Brock travels to Johto, where he continues to help Ash and Misty. Upon the conclusion of the Silver Conference, the three part ways, Brock heading back to Pewter City. It is there (in an episode of Pokémon Chronicles) that he discovers his estranged mother Lola (Mizuho in the original), who, because she is a Water-type Pokémon Trainer, has ruined the reputation of the Gym he defended so long ago and had ended up filling the gym with water (causing Brock to comically freak out and keeps repeating "A LAKE!!!" when he first sees it).
By defeating his mother, he restores the Gym's reputation, and proceeds to leave all his Pokémon (except Forretress) to his younger brother Forrest, before departing for the Hoenn region, where he catches up with Ash 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 and Brock met up with Ash in Sinnoh. While there, they meet a new coordinator named Dawn and her partner Piplup, who joins them on their journey through Sinnoh .
During this time, both Brock's father, Flint (Munō in the original, who was also Brock's predecessor as Gym Leader), ran off again, and his oldest younger brother Forrest (Jirō in the original) took the role of Gym Leader in Pewter City, as well as the responsibility of caring for his many other younger siblings. Brock is the oldest of ten siblings, with five brothers and four sisters.
Brock is always well-equipped, and is sometimes the voice of reason when Ash and Misty (and later, May and Dawn) get into an argument. He is also hardworking and is always willing to help others. Coupled with his experiences in taking care of others, Brock often prepares food and does most of the chores for the main characters. Brock is also exceptionally good at making food for Pokemon.
At the end of the Pokémon: Diamond and Pearl series, Brock aspires to become a Pokémon Doctor, and work alongside Nurse Joy. After departing from Ash and Dawn, Brock returns home to Pewter City to train to become a Pokémon Doctor.
In the Pokémon: Diamond and Pearl Special Episode 2, he has photos of Ash, Misty, May, Max, Dawn, Piplup, and Pikachu to remind him of how much fun it was traveling with them. He also chooses his brother Forrest to replace him as Gym Leader
In the Black and White Special he encounters Cilan in a small town. He helps treat Pansage after it got hurt fighting a Gyrados. The two form of fast friendship and work together as they help Gyrados. As they part they both realize they never asked for each others name.
He appears frequently in the MCF series. In "Mystery Case Files: The Fanfiction" episode "Wicked in Witchville" he was taken by a mysterious witch along with the other Pokemon trainers and the MCF's boyfriends so they must rescue them. In "MCF: Families Reunited at Last" episode "Switched Minds" where he was swapped minds with El Jefe.
He makes a cameo in "MCF: The Song of Circe" as one of the boys who tries to woo Circe.
- Brock's personality reflects Uxie's one, the Knowledge Pokemon.
- In the episode, "A Crowning Achievement", Brock actually temporarily opens his eyes in a flash second to try to cheer up Larvitar.
- Brock's eyes are rarely open, excluding the examples shown.
- At the beginning of the anime, Brock didn't show a lot of interest in girls. After a while, he finally shows it.
- Brock is the only character who appears in all the seasons except the Best Whishes seasons, although he only appears in flashbacks made from Dawn and Ash.
- As seen in the episode "The Taming of The Shroomish", Brock is apparently afraid of ghosts. While he and May were shopping, she heard of a haunted mansion. He was terrified just hearing about it, and, while May was overjoyed, she literally had to drag him there. Whenever he heard somebody talking about ghosts, he leaned away. He was afraid of the mansion, and showed dismay and horror when they talked about advancing inside. He was fine once he found out that the ghosts were actually Shroomish, though. He was also fine on DP090: Ghoul Daze!, among other episodes.
- Brock's real dream is to become a Pokémon doctor. However in "Jirachi: Wish Maker", he said he wanted to become a magician because he could make "beautiful girls appear out of thin air".
- He can notice the small things that make each Nurse Joy and Officer Jenny physically different.
- It is said that Brock was taken out and replaced with May due to the notion that he would be racially insensitive to Pokemons growing world wide audieance. When it was revealed that wasn't true they put him back in for Johto.
- It is unknown at this point if he'll return for a main role again since "Switched Minds". But according to trachie17 he'll reappear in a flashback story for Tracy and Tricia for their Pokemon training. He returns in MCF in the Kalos Region and MCF: Giovanni's Revenge.
- He along with Misty and Ash appear to be close friends with Seamus, Tricia and Tracy as they traveled
- Eric Stuart who originally voiced Brock, also is famous known for voicing Seto Kaiba in the original series Yu-Gi-Oh series and GX. It should be known that Seto Kaiba is the Anti-Hero for the series while Brock is a hero for Pokmon. Is should be also noted that Eric Stuart also voices one of Tracy's enemies turned friend Robert Lopez as an adult.
- Mystery Case Files: The Fanfiction(Debut; episode: "Wicked in Witchville")
- MCF: Families Reunited at Last(episode: Switched Minds)
- MCF: The Song of Circe(Cameo)
- MCF: Mewtwo Returns (Upcoming)
- MCF: 2000 (Upcoming)
- MCF: Spell of the Unknown (Upcoming)
- MCF: Giovanni's Revenge (Upcoming)
- MCF in the Kalos Region (Upcoming)