You need to go to relic castle and the backpacker will give you a Tirtouga or Archen fossil.
The cover fossil is the Pokemon Tirtouga - a Water/Rock-type Pokemon and #070 in the Unova region.
What's a skull fossil
in the nacrene gym
yes
fossil in relic castle
Take it to the museum in Nacrene City
Almost any fossil can be received from the worker after the old amber, you just happened to get that first. He will give away a random fossil every day except for the new bird and turtle fossil Pokemon.
To get fossil pokemon go to the Nacreen Museum and talk to the people right inside the door. One of them takes you fossils and turns them back into pokemon.
Yes, in Twist Mountain, a man will give you fossils for the Gen I -> IV fossil pokemon. It is possible he will give you a Skull Fossil.
u mean a cover fossi? u get a tirtouga
At the second gym there is a lady on the right at the entrance
I have Pokemon Sapphire, but it's the same thing in both games. There are two fossils, one is the root fossil and one is the claw fossil. The root fossil will get you a Lileep (which then evolves into a Cradily at lvl40) and the claw fossil will get you an Anorith (which also evolves at lvl40 to give you an Armaldo). Hope that helps!!