After talking to Jasmine in the Lighthouse, you have to go to Cianwood City and get a Potion from the Pharmacy there. Take it back to Jasmine and she'll go back to her Gym.
Jasmine is the Olivine City Gym leader
Go back to Olivine City and give the medicine to Jasmine. Then fight her at the gym.
To battle Gym Leader Jasmine of the Olivine City Gym, you must have gotten the SecretPotion and healed the Ampharos.
Get the secretpotion from a guy there and go back to Olivine in the lighthouse and cure the Ampharos in lighthouse and then battle Jasmine
Yes and her Pokemon are Steelix, Magnemite and Magnemite try to use fire types.
You must go get some medicine for her from cainwood, and bring it to her at the top of the lighthouse. Then she will return to her gym.
there will be a secret door at olivines lighthouse and it will take you to jasmine then go back to the gym then jasmine will battle you
You can get to Jasmine but this time beat Chuck and obtain HM Fly, go back to Olivine City, Jasmine uses the secret potion to heal Ampharos and you can beat her at the gym.
to battle Blue in Pokemon Heartgold you must defeat the 7th gym leader, then find him on cinnabar island. Talk to him, then he will go back to his gym for you to fight
there is no 9th gym
Travel to the end of Route 25 and she will be standing there.
meet him an island near pallet town