After you beat her you can use the move Rock climb outside of battle. There is one catch though, you have to find that HM in the blizzard in the snow just before lake Acuity. Once you get it you can help your rival at lake Acuity.
which gym leader?
After defeating the 5th gym leader (Norman) in Flora Sky, the next goal is to get to the 6th gym leader. Go to maulville city and go to the right of the city.
Go to Evergrande City to beat the Elite Four
well you go to the place where they make you the new chapion
Go to the Radio Tower in Goldenrod City.
go and beat the 8th gym
YES! GO to the lab after beating the first gym leader and you can change people
You release all your pokemons because they hate u
After beating the third Gym Leader (Maylene the Veilstone Gym Leader) in Pokémon Diamond, you then head to Pastoria City to battle the Gym Leader there who is named Crasher Wake.
go to the teAM GIGLATIC building and beat everyone inside
There are 8 gym leaders, you have to specify which Gym leader you're talking about. If you beat the 1st one, you have to travel east until you reach a cave called MT. Moon.
After beating the 16th Gym leader, you can Catch Mewtwo, and then just train for Red.