- If you were looking for the card in the Pokémon Trading Card Game, see Old Amber (Majestic Dawn 84).
In the Generation I and III games, Old Amber can be obtained in a back room of the Pewter Museum of Science. The HM for Cut is needed to get there, as a bush blocks it off. A key item, it is given to the main character by one of the scientists working there. If brought to the laboratory on Cinnabar Island, the Old Amber can be regenerated into an Aerodactyl.
In Diamond, Pearl, and Platinum, it can be found by mining in the Underground after obtaining the National Pokédex. If brought to the Mining Museum in Oreburgh City, the Old Amber can be regenerated into an Aerodactyl.
The Old Amber is different than the other fossils, being a type of fossilized substance rather than a fossil named by its appearance (However, the Aerodactyl skeleton in Pewter City Museum implies that it does have its own fossilized remains). It is possibly inspired by Jurassic Park, in which genetic engineers extracted dinosaur DNA from mosquitoes trapped in amber and used it to recreate dinosaurs.