The Glittering Cave is a dark, winding cavern where you'll encounter Team Flare members. You'll need to use Flash (or have a Pokémon with the ability to light up dark areas) to navigate effectively. Wild Pokémon like Onix, Machop, and Cubone can be found here. Your goal is to find the Jaw Fossil (X) or Sail Fossil (Y) at the end of the cave. After obtaining the fossil and dealing with Team Flare, return to the Fossil Lab in Ambrette Town.
