You will first find Gardenia in the forest in front of the Old Chateau just before Eterna City. Then, you will find Gardenia in her gym at the bottom right hand corner of Eterna City.
By using flying bug and fire pokemon if possible
gardenia - grass type
i don't know, i asked the question.
gardenia is in eterna city, near the bottom.
gardenia is the grass gym leader of eterna city u can see her at the haunted house but u must beat her in a gym battle
In the Eterna gym in eterna city.
eterna city gym leader gardenia she uses grass types
Gym Leaders: Roark, Gardenia, Maylene, Wake, Fantina, Byron, Candace, and Volkner.
you do not find dialga in Pokemon pearl
I don't think you can battle Gardenia in Pokemon HeartGold.
After you beat gardenia you can use cut. Then go to the Eterna forest near the eterna entrance go up and use cut and there is the mansion!!!
Trade with Pokemon Pearl or Pokemon Platinum