You have to beat the Pokemon League and get the National Pokedex and go underground and dig for one.
No, there are no other regions in Pokemon Diamond.
there are no other regions.
You can get other fossils when you defeat the Elite Four and the Champion and receive the National Pokedex in Pokemon Diamond.
No.
Unfortunantly you cant go to other regions in Pokemon diamond and pearl. its not like leafgreen,firered,gold,silver and crystal version where you travel to different regions. You can't, Sinnoh is the only region available in the game.
I'm not sure what fossils you're looking for, but you can get Helix ,Dome,Amber,Armour and Skull Fossils. In Diamond, you can get a Skull Fossil. In Pearl you can get a Armour Fossil. All other fossils can be gotten after both games.
There is none
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Armour,Skull,Helix,Dome,Old Amber and Root Fossils.
I'm not sure exactly if you can get it in diamond..... But if you can, you have to dig it up underground
No you cannot go to other regions in Pokemon Pearl or Diamond version but in Pokemon Heart Gold and Soul Silver you can go to the Jotoh region.
The Sinnoh region is the only region in Pokemon Diamond, although the area in the northeast of Sinnoh is like a mini-region.