To revive a fossil, you'll have to take it to Devon Corporation, located in Rustboro City. Go to the second floor and speak to the scientist on the lower right corner.
Chat with our AI personalities
level 20, as with all fossils in all games
You do not " hatch " fossils in Emerald, but you can revive them at the Devon Corporation on the second floor in Rustboro City by talking to a scientist there.
in the museum talk to the guy alone at the desk he will revive it
Beat the elite four after having seen all 150 of the diamond/pearl Pokemon, then you will receive the national dex. From there, the fossils of the two can be found underground in the walls- take them to the Oreburgh museum to revive Lileep and Anorith.In Pokemon emerald only one may be selected.
You can revive fossils in Pokémon White in the museum in Nacrene City. Once you have entered the museum, talk to the person in the blue hat on the right hand side.