Hearthome City has the 5th Gym Leader. The 5th leader is Fantina and she uses Ghost-type Pokémon.
well you will have to defeat the 5th gym leader and once you defeated her she will give you the TM move shadow claw you will find the 5th gym leader at hearthome city before you deafeat the gym leader you will need to defeat the 4th gym leader in order to defeat the 5th gym leader
In canalave city
In order to get The gym leader to appear in her gym, go to the Pokemon contest arena in the north end of the city. There, you will meet your mother and get a tux, as well as have a chat with the gym leader. She will then meet you at the gym.
You can find the Eighth Gym Leader, Clair, at Blackthorn City. But first you will need to battle and defeat Team Rocket in Goldenrod City, save the director of the Radio Station, and he will give you the Silver Wing. Now go to Mahogony Town and go through Ice Path. You are now at Blackthorn City. Clair will be in the Gym to battle after you've completed that mission.
In the team steam hideout after snowce city
candace the leader of snowpoint gym is the 7th leader
You can find the fifth Gym Leader in Hearthome City. Her name is Fantina.
you can find it in the ciann city pharmacy
You can only battle Hearthome City's gym leader Fantina after you have defeated Pastoria City's gym leader, Crasher Wake.
In Sunnyshore City.
In Pokémon HeartGold, you can find the 3rd Gym Leader in Goldenrod City.
you find Giovanni in silph co.
The eighth gym leader is Claire in Blackthorn City
Blue is the guy you go to if you want to find the viridean gym leader
sunyshore city
in pastoria city