Where can I find the Lustrous Orb in Pokemon X and Y?

Question

I've searched a lot of websites, but no one clearly states how to get the Lustrous Orb in Pokémon X and Y.

Answer 1

You can get all three Timespace Orbs (Adamant Orb, Lustrous Orb and Griseous Orb) in Zygarde's Chamber in Terminus Cave in Pokémon X and Y.

You can find the Griseous Orb down the northwest path of the chamber, the Lustrous Orb down the southeast path of the chamber and the Adamant Orb down the southwest path of the chamber.

For more help check out this video here.

Source

Answer 2

You find the Lustrous Orb, along with the Griseous Orb and the Adamant Orb, in Terminus Cave. This video here might help you find the direct location.

Hope I helped. :)