To reach Maylene, the third gym leader, you must solve a puzzle within the gym. There are four gym leaders in four squares within the puzzle, and ultimately you must battle all four to colpletely solve the puzzle to reach Maylene. The puzzle is actually quite simple, similar to Flannery's puzzle in the Hoenn-based, except you push pieces instead of turning them.
On Diamond & Pearl, she will be in Veilstone City. However, on Platinum, the 3rd gym leader is located in Hearthome City, as opposed to the series.
The third gym leader in poekmon pearl is maylene, a fighting type gym leader.
Sure you can. In ruby, the third gym leader leaves his gym.
Veilstone city,the gym leader is a fighting type
She is in Veilstone City.
you beat her with a fire type
In Ruby, Sapphire and Emerald, the 3rd Gym Leader is in Mauville City and in Diamond, Pearl and Platinum, the 3rd Gym Leader is in Veilstone City.
In what game?
The seventh gym leader is Candice, the Ice Type leader. She is at Snowpoint City.
In the goldenrod gym.
sunyshore city
you find her in the old chateau
fighting{I recommend alaczam and vespiquen}