It is the Pewter city gym Brock
pokemon indigo has been replaced by pokemon lake,a stupid rip-off website.if you still have access to pokemon indigo go to a gym leader area.
When you click a gym leader and you ended in a map, you see a trainer that has red around it. That's the gym leader. Click the gym leader then click battle.
Use any POKEMON that is effective against GROUND type
You first must make sure that the gym leader is in the gym, because in some games you have to locate the gym leaders first. After that, you may have to get through a puzzle in the pokemon gym to get to the gym leader at the end of the puzzle. After that, you will battle the gym leader, and if all of her Pokemon faint, then you will probably be given a gym badge.
The first Gym Leader who is Falkner, the Violet City Gym Leader, he has a Pidgey and a Pidgeotto.
i dont think its possible
The first pokemon gym is a Rock based gym and its leader being Roaxanne.Its the easiest gym to beat :)
Brock the rock gym leader
Brock is the first gym leader in pewter city.
by beating the gym leader
The first gym in Pokemon diamond is in Oreburgh City
first get a ice type Pokemon then go threw the whole gym face gym leader and get the badge