Go to rustboro city and go inside the Devon corp in there go upstairs and you will see a bunch of lab guys talk to the ones on the bottom until you find the one who says he has a resurrection machine let him have the fossil leave the corp come back and talk to him again and he will give you the revived Pokemon from the fossil either lileep or anorith.
No, not all fossils can be found in Omega Ruby or Alpha Sapphire however the fossils that can be found would include the Dome Fossil also known as the Kabuto fossil, Plume Fossil which is the Archen fossil and Armor Fossil which is also the Shieldon fossil can be found in Omega Ruby, the Skull Fossil also known as the Cranidos fossil and Cover Fossil (also known as the Tirtouga fossil) can be found in Alpha Sapphire while the Old Amber Fossil which is the Aerodactyl fossil can be found in both Omega Ruby and Alpha Sapphire.
Take your fossil to the Devon Corporation in Rustboro City. On the second floor, the guy on the back row will take it and turn it into a Pokemon for you.
A Pokemon
you get the Sapphire in dotted hole (you use cut to get into dotted hole)
You can not catch Lileep in Sapphire or Ruby. You find two fossils in the Desert and one of them is Lileep. To make the fossil Lileep, go to RustBoro city and go the Devon Cooporation. On the second floor, there is a scientist at the bottom who will turn fossils into Pokemon.
root fossil is lileep claw fossil is anorith
You'll get an Anorith. CLAW fossil- anorith root fossil-lileep helix fossil- kabuto
The Root fossil is the Pokemon Lileep and the Claw fossil is anorith =D
dig dig dig
Cradily can only be obtained in Pokemon Sapphire by evoling a Lileep. Lileeps can be obtained by resurrecting a Root Fossil.
If given to the Devon researcher in the Devon corporation the claw fossil can be revived into Anorith.
talk to the fossil man west of fallarbor town
fallourbaur town in route 114 there is a house
go to fossil manics house and talk to the girl by the tunnel
From the Fossil Maniac's house, which is in route 114.
he is in lavaridge town on the top left side of the town
the best pokemon to use is mudkip.