How do you get a mew fossil in pokemon pearl?

In Pokémon Pearl, you cannot obtain a Mew fossil directly, as Mew does not have a fossil form in the main series games. However, you can acquire Mew through special events or distributions, which were more common in earlier Pokémon titles. If you're looking for a way to obtain Mew in-game, consider using the Nintendo Wi-Fi Connection or checking for events that may allow you to receive Mew through Mystery Gift. Otherwise, trading with someone who has a Mew is another option.