On cinnibar island in a research lab enter the lab and go into the last room talk to the scientist near the big machine give the fossil to him leave come back to get kabuto/omanyte give him the old amber to get aerodactyl.
Chat with our AI personalities
You could revive it at the oburgh museam
in the museum talk to the guy alone at the desk he will revive it
safari place
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.
after you defeat ash, it is found in Johto, there you can find it