The Lysandre Labs (Japanese: フラダリラボFleur-de-lis Labs) is located behind a bookshelf in Lysandre Café, which is located in Lumiose City's Magenta Plaza. It is one of Team Flare's headquarters. It is also where the ultimate weapon is activated from.
After the Secret Lab is unlocked by Malva, the player can use the elevator to go to the Hidden Floor. However, on floors B2 and B3, the player is not given an option to travel to the Hidden Floor. In addition, the player is unable to travel to B3 from the Hidden Floor, despite access to B2 from the Hidden Floor.