U can find them underground it's so rare
I heard you can find it in the undergound digging, but its rare
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.
the old amber reveals aridactul
from a fossil
You dig for it under ground after you get the national pokedex and the are rare.
You can get it by revive the old amber which can be found underground after the national dex
Dig Dig Dig, until you find one. im not sure exactly, i think i went underground in Eterna City
Route 210 (South) - Pokemon Breeder Amber
you have to dig in the under ground. better chances of finding it after national dex
Go underground and dig up an old amber. Then take it to where ever you go to resurrect fossils. sorry i don't know where it is because my brother has platinum not me. The old amber is very rare so it will take a long time!
dig up old amber from underground and then talk to the guy in the oreburgh fossil museam.
You can find an Old Amber by smashing rocks in the Ruins of Alph. There are no guarantees that you will get one, it's by luck.