Way south of the city
you go in the orburgh gate, (the path east of jubilife city) keep walking and this hiker will catch you and give it to you.
its by hearthome city and northwest of orburgh city lol!!
Synshrone city is not a real city in Pokemon Diamond.
Get the Orburgh City Gym Badge called "Coal Badge" then go to Jubilife city and go past the trainer school and there stands the gts building
Fossils turn into Pokemon like cranidos, shieldon, aerodactyl etc. Revive them at the mining museum in Orburgh Town/City.
Blackthorne city is not in Pokemon Diamond but in Pokemon Heart Gold/Soul Silver
Fortree City is a location exclusive to Pokemon Ruby, Sapphire and Emerald. This means it is impossible to visit Fortree City on Pokemon Diamond.
The first gym in Pokemon diamond is in Oreburgh City
the fifth gym on Pokemon diamond is the one in herthome city,
south of hearthome city
Pastoria City.
he is in Eterna city.