In Pokemon Blue you can find the Helix and Dome fossil at the end of Mt. Moon, you can find the Old Amber at a secret Room in the Pewter City Museum(use cut on the bush blocking the alternate entrance into the building).
Helix - Omanite
Dome- Kabuto
Old Amber- Aerodactyl
You get to choose between the Jaw and the Sail Fossils in the Glittering Cave and they can be revived in the Fossil Lab in Ambrette Town.
If you pick the Jaw Fossil you'll get Tyrunt and if you pick the Sail Fossil, Amaura is the one you'll receive.
The fossils from past Generations can be found by using the TM Rock Smash but they are rare.
The underground
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You can find fossils in the Underground Tunnels, or underground. Just dig for them as you would spheres.
go under ground and find fossils
i think you have to give the fossils to the museum in pewter city
You use rock smash and can sometimes find fossils.
At Cinnabar Island there is a Lab. Someone there will extract them.
Ruins of Alph. If you smash the rocks then you will find a lot of shards and some fossils.
there is no fossils of squrtle in any game
The underground
amber kauto and amdrie
Dig Underground
Yes. I found 3completely rare fossils by digging.
to find fossils go underground by getting the kit and then you can just find them while digging
you find them from i guy in this guy in a mountain i think.
only the underground.
You can't find Ekans in Pokemon Blue. You have to get it by trading from Pokemon Red.