In Pokémon HeartGold, you can find the 3rd Gym Leader in Goldenrod City.
She is in Fuchsia City
After beating blue, the 16th gym leader
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
her name is clair. she is a dragon trainer. she is in Blackthorn city
u need to push the snowballs around and find a path to her like to pryce the seventh gym leader in pokemon soulsilver and heartgold
In the goldenrod gym.
Violet city its past the town that's after new bark
The Mahogany City gym leader is not in Cianwood. He is in the gym in Mahogany, not anywhere else.
The third Gym Leader is Lt. Surge and you can find him in Vermilion City.
i think your taking about blaine he is found in sefoam island take the later not the stairs.
You fid him back in his gym in veridian city. The place where Giovanni use to be
You can't find registeel in Pokemon HeartGold.