Here's why:
* Fossils are extinct: Fossils are the preserved remains of ancient creatures. They are not living organisms, and there is no known scientific way to bring extinct creatures back to life.
* Pokémon are fictional creatures: Pokémon are fictional creatures that do not exist in reality. They are designed and imagined by game developers, and their "revival" is a gameplay mechanic, not a real scientific process.
In *Pokémon Sapphire*, you can use fossils to revive certain Pokémon by taking them to a specific location. This process is fictional and does not reflect real-life paleontology or resurrection.