In diamond and pearl, the 5th gym leader is Fantina in Hearthome city, just go back to Hearthome Gym and she'll be there. You must defeat Wake in Pastoria Gym and give the Old Charm to Celestic town elder before that.
you find him
I dont know where it is. Go find it yourself
You can find the fifth Gym Leader in Hearthome City. Her name is Fantina.
i believe it is pastoria city-> water type gym leader-> gyrados flozel and 1 or 2 others i can't remember If its not him try harthome city->ghost type leader-> mismagius gengar and drifblim
it depends on which sinnoh game you are playing. if you are playing diamond or pearl, then you have to beat maylene (veilstone) and wake (pastoria) before you can return and challenge her. if you are playing platinum, then she is the third gym leader rather than the fifth.
sunyshore city
go to enterna city
it is in hearthome city
The seventh gym leader is Candice, the Ice Type leader. She is at Snowpoint City.
you get it ffrom fifth ym leader
you find her in the old chateau
the fifth gym leader is Koga which is in fuchia city or you can switch the order and challenge Sabrina in saffron city but you have to beat Giovanni in the silph co.