Here's why:
* Fossil Locations are Fixed: The locations where you find fossils are fixed in the game. You can only find them in specific spots before obtaining the National Dex.
* Explorer Kit Function: The Explorer Kit doesn't change the locations of fossils or create new ones. It primarily allows you to access hidden areas with treasures and rare encounters.
To get fossils in Pokemon Platinum:
1. Before the National Dex: Find fossils in their designated locations.
2. After the National Dex: You can use the fossils you found to revive Pokémon at the Fossil Revival Center in Celestic Town.
While you can't find new fossils after the National Dex, there are other ways to obtain rare Pokémon, including:
* Trading: Trade with other players to obtain rare Pokémon.
* Breeding: Breed existing Pokémon to obtain different variations and rarer Pokémon.
Remember that the Explorer Kit is a valuable tool for exploration but doesn't affect fossil locations in Pokemon Platinum.