Miraculous Ladybug Season 6 Episode 12 The Dark Castle Episode Title: The Dark Castle Episode Description: It is almost Alix's birthday, so Marinette decides to temporarily relieve Alix from her duty as Bunnyx to allow her to have a birthday party in the present. Marinette holds the Rabbit Miraculous, fusing with it to be "Bunnybug", and watches the party from the Burrow. Marinette uses the Rabbit's time travel powers to subtly prevent several mishaps during the party, but when one of her interventions accidentally results in the destruction of the world, she reverses it and stops meddling. Meanwhile, Armand d'Argencourt has been campaigning to demolish the Louvre Pyramid and convert the museum back into a castle in a bid to restore the French monarchy. He is akumatized into "The Dark Castle", turning the building itself into a gigantic anthropomorphic castle surrounded by knights. Marinette lends the Rabbit Miraculous to her future self to monitor the Burrow while she defeats the villain as Ladybug, aided only by Cat Noir in order to allow the rest of her friends to enjoy Alix's party. Later, Marinette offers to keep the Rabbit Miraculous in order to allow Alix to live a normal life, but Alix insists on remaining Bunnyx.