In the pewter city gym.
After defeating Brock go right of the city.
Train and fight him again until you beat him
Yes Brock's Golbat evolves in "Control Freak".
YOU NEED TO FIGHT ALL POKEMON AND YOU WILL COMPLETE THE POKEDEX. AND THAT WILL HELP YOU TO GET THE NATIONAL POKEDEX BY TALKIN TO PROFESSOR OAK.
He looks like a scientist, and you'll find him by going east of Pewter city after defeating Brock in his gym.
Geodude level 12 Onix level 14
the boulder badge from brock
When you leave Pewter City after defeating Brock.
After defeating Brock go right of the city.
Never.
y beat brock at pewter Jim
you just fight them
Brock isn't in Diamond and Pearl. He is in another game but i forgot which one it was. Hes in Pokemon LeafGreen and FireRed as the frist gym leader and there he got geodude and onix
Brock's Gym is located in pewter city. He owns rock type Pokemon so use a water or fight type Pokemon in your battle.
Raise your charmander to lvl. 13 and it will learn metal claw. Use Metal Claw to defeat Brock since it is super-effective against rock-type Pokemon.
After you've beaten all the previous gym leaders(Brock, Misty, Lt. Surge, and Koga), and have obtained the tea from celadon, you can fight Sabrina, whose gym is in Saffron. Your Pokemon should be lv.'s 40+.
if your asking can you get to red to fight him you can't, you are red