If you go underground, you might just get lucky and find one down there! :) good luck! I have like 5 so we could trade.........or I could just give you an aerodactyl
You have to wait until you have the national pokedex before you can find it.
in eterna city
underground, they are rare.
You need to go in the underground and find an Old amber or trade it with someone.
You find a old amber underground (really rare) and get the guy at the mining museum to turn it into a pokemon.
One must go underground and mine for it. In my game, it took a little bit to find (with out cheats)
The Pokemon Aerodactyl can be obtained from the Old Amber. You can find the Old Amber from the Underground. Take it to the Mining Museum in Oreburgh City to obtain Aerodactyl.
revive old amber obtained by mining in underground or trade
you have to find an old amber underground which are very rare and take it to the fossil museum in oreburg city hope it helps XD
In Pokemon Diamond you can find a Skull Fossil (different guy) i think he means what fossils do you find. here are the ones i know of, just in case; skull, shield, root, old amber, claw, that water thingy that is an omyanite and maybe more.
Aerodactyl comes from the old amber you need to revive it on seafoam islands on Pokemon leaf green and fire red , the coal museum in oreburgh on diamond and pearl. hope this helps!
Armour,Skull,Helix,Dome,Old Amber and Root Fossils.
Go to pewter city and go toward the museum but look for the back entrance use cut to get past the tree then go in and talk to the scientist near the orange ball he will give you it this is the old amber.