How do you recover a Pokemon fossil in white version?

1. Go to the Relic Castle. In Castelia City, take the west exit and follow the path to the Relic Castle.

2. Enter the Relic Castle. Once inside the castle, go to the room on the left.

3. Talk to the scientist. The scientist will tell you about a Pokémon fossil that he found. He'll give you the fossil and ask you to take it to the museum in Castelia City.

4. Take the fossil to the museum. Go back to Castelia City and enter the museum.

5. Talk to the museum curator. The museum curator will identify the fossil and give you a Pokémon Egg.

6. Hatch the Pokémon Egg. The Pokémon Egg will hatch into a Pokémon.