The Pokémon the second Gym Leader has in "Diamond" are Cherubi, Turtwig and Roserade.
eterna city
The second gym leader in Eterna city
Eterna city at bottom right
i think the 2nd gym leader is in Jublife or Oreburgh city.
The first gym in Pokemon diamond is in Oreburgh City
Use a fire pokemon. That's what grass is weak against.
eterna city gym leader gardenia she uses grass types
The Second Leader Is In Eterna City
The 6th gym leader is in Canalave City.
you beat the gym leader
He is in the lighthouse
just beat the fourth gym leader