The third gym in Pokemon diamond is in veilstone city. The gym is a fighting type gym so flying types are super effective on the fighting type Pokemon. Fire type moves are also effective on her lucario. Ghost type moves are also effective on her meditite. To get to the gym you have to go south from the Pokemon center after you beat team galactic in veilstone city. Then go west until you reach the farthest set of stairs then go north to the gym.
there was a gym and a pool
First gym: Rock type. Use Water. Second Gym: Fighting type. Use Flying or Psychic. Third Gym: Electric type. Use Ground. Fourth Gym: Fire type. Use Ground or Water. Fifth Gym: Normal type. Use Fighting. Sixth Gym: Flying type. Use Ice or Electric. Seventh Gym: Duel Rock/Psychic types (it's a Double Battle). Handle with Water and/or Dark/Ghost types. Eighth Gym: Water type. Use Electric or Grass. Good luck.
The Hearthome City gym is a Ghost-type gym which is the 5th gym in Diamond and Pearl and the 3rd gym in Platinum. The gym leader is Fantina, who uses a Drifblim, Gengar, and Mismagius in Diamond and Pearl and a Duskull, Haunter, and Mismagius in Platinum. Defeating her gets you the Relic Badge.
yes titanic did have a gym on board
The third gym leader is Whitney.
the hearthome city gym
defog is the third usable hm after you beat fantina, the hearthome gym leader.
Fantasia is the third gym leader in case you didn't already know that
The third Gym is in Vermilion City. Its speciality is Electric type,and its weakness is water.
Wattson the electric gym.
The third gym is in Goldenrod City. It is located north of the Ilex Forest. The gym is in the upper right portion of Goldenrod City.
Sure you can. In ruby, the third gym leader leaves his gym.
The third gym leader is in Goldenrod City in the radiotower. after you get the radio card she goes to her gym to the east of the radiotower.
it is Mauville gym
It is an HM you get from the third gym leader.
In the goldenrod gym.