1. Find the Claw Fossil: You can find the Claw Fossil in various locations throughout the Paldea region. It's often found in the West Province (Area Two) and North Province (Area Two).
2. Go to the Pokemon League: Once you have the Claw Fossil, head to the Pokémon League, located in the northeast of the map.
3. Find the Scientist: Inside the Pokémon League, there's a scientist by the name of Professor Kido. Speak with him.
4. Revive the Fossil: Professor Kido will revive the Claw Fossil for you, bringing to life a Shelder!
Remember:
* You can only revive one fossil at a time.
* After you revive a fossil, the scientist will not be able to revive another for you until you defeat the Elite Four and become the Champion.
Enjoy your new Shelder!