Brock is a character from the Stupid Mario Brothers series, and is acted by Austin Stevenson. He is Ash's best friend. He does not play a big role in the plot of the series. He is mainly used for comedy, mostly making fun of the Pokémon character Brock. Brock from Pokémon has lines for eyes, so they pretend Brock is blind.
Brock does appear in the series as a minor character. He is used as a referee for sports in some episodes.
Brock does appear in the Movie, manily just playing Pokémon with his best friend, Ash.