Helix fossil
Its a sheildon fossil
There is armour fossil in Pokemon pearl, it is a fossil that has a shieldon in it, or you could trade with someone from diamond for a cranidos.
pearl is not a fossil, you sell it at pokemon marts for lots of CHA CHING
diamond- skull fossil- cranidos-rampardos pearl-armor fossil- sheldon-bastiodon
in the underground.
Underground
You cannot get Cranidos in Pokemon Pearl unless you trade to get the Skull Fossil from a friend. You can only find a Skull Fossil in Diamond.
Oreburgh City
The fossil maniac is the scientist in the oreburgh muesum.The fossil maniac in Pokemon Pearl is located in Oreburgh City. He can be found in the Oreburgh City Museum, to the right side of the counter.
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At the beginning of the game before getting the national pokedex you can get: Skull Fossil - Cranidos *Exclusive to Pokemon diamond Armor Fossil - Sheildon *Exclusive to Pokemon pearl After receiving the national dex you can also find: Helix Fossil - Omanyte Dome Fossil - Kabuto Old Amber - Aerodactyl Claw Fossil - Anorith Root Fossil - Lileep
Find a fossil underground. I did.