Here are some ways to get Pokémon that are not available in the main story of Pokémon Pearl:
* Trading: You can trade with other players to get Pokémon from other generations.
* Events: Nintendo sometimes releases special events that allow players to obtain specific Pokémon. These events are usually time-limited.
* Gen 4 ROM Hacks: Some fans create modified versions of the game ("ROM hacks") that allow you to catch Pokémon from other generations. However, these are unofficial and may not be compatible with the official game.
Here's what you can do with fossils in Pokémon Pearl:
* Find Fossils: You can find fossils in the game by using the "Dig" ability of a Pokémon like Omanyte or Kabuto.
* Revive Fossils: You can take fossils to the "Fossil Revival Center" in Oreburgh City to revive them into Pokémon. Each fossil will revive into a specific Pokémon (for example, the "Helix Fossil" will revive into Omanyte).
Remember, if you want to find out which Pokémon are available in Pokémon Pearl, the best place to look is the official Pokémon website or a reliable Pokémon fan wiki.