There are two main chambers:
* The Shadow Chamber: This is where you face the Shadow Pokémon for the first time. You need to fight them to purify them.
* The Chamber of Darkness: This is the final chamber where you face the final boss, the leader of the Shadow Pokémon. It's accessible after completing certain tasks and purifying several Shadow Pokémon.
The exact location within the Shadow Pokémon Facility is not specified in the game, but it is usually found deeper within the facility after you progress through the story.