Success! You were able to sneak your way through Team Flare's headquarters without getting spotted, managing to reach the secret lab behind Lysandre's office. Once in the secret lab, you're met with a chilling sight: the fabled avatar of death and destruction, Yveltal, was being contained in a vessel with tubes coming out of the vessel, seemingly draining the creature's energy for who knows why. In your disbelief, you rush to the control panel and ooen the vessel, inadvertently activating the alarm in Lysandre's office, which you found out when you heard Team Flare's boss himself running into the lab.
Lysandre:"You idiot! What have you done?!"
You were about to ready your Pokémon team for a battle against the cruel Lysandre, but suddenly you both got distracted by the sudden shaking. Yveltal was awakening, and to say that it was not happy being contained and drained would be an understatement.
Yveltal:"FINALLY FREE! AND NOW THIS CURSED DOMINION WILL FEEL MY WRATH!"
Yveltal unleashed a destructive shockwave, knocking you and Lysandre back and blowing a hole into the celing. This is your chance to escape the Team Flare headquarters, take it!