TImeline: Miraculous Ladybug season 3.

After the failure of Mayura's plan to get Cat Noir's miraculous (By using a sentimonster version of Ladybug to trick him but failed when the real Ladybug showed up) and Nathalie (Mayura when not transformed) was being scolded (I think) by Gabriel Agreste back at the Agreste Manor in Gabriel's atelier (On the first floor).

Gabriel: Looking down at Nathalie "You've disobeyed me again, Nathalie. And you put yourself in danger for nothing." He said while Nathalie coughs and her glasses fall to the floor as he puts her glasses back on "Your idea was brilliant, but you don't need a Miraculous to help me." He said, letting us all know that he is HawkMoth.

Nathalie: Not wanting to let her sickness (Given by the peacock miraculous since it is broken miraculous at this time) hold her back, she stands up while determined to help Gabriel get Ladybug and Cat Noir's miraculous "There is something else you needed Mayura for. To find the Guardian."

Gabriel: Shakes his head, not agreeing with Nathalie. "I'm not so sure anymore."

Nathalie: Sighs and accepts Gabriel's decision and gives Gabriel the Peacock Miraculous "If you ever need Mayura again, I'll be here for you."

Then, Gabrial gets an notification on his touchscreen monitor as he goes to check it out and it was from the News about some other... Cat Noir?! That's you by the way.

Gabriel: Shocked while very confused "WHAT?!" He said while watching the news while Nathalia walked up to see what Gabriel was watching while coughing a bit "This can't be Cat Noir, they look completely different!"

Nathalie: Sees you on the news while shocked "Is that... another Cat Noir?" She said as Nadja (The news reporter) began to speak on the News

Nadja: On the News "Don't be amused, it's just the news! This is Nadja Chamack, live from the Arc de Triomphe again, but this time there's this Cat Noir lookalike! Could this be the return of Cat Noir's copycat?"

Nadja said as the camera zooms in on your appearance (By the way, you are transformed, so when you transform back into your citizen appearance, no one will know that you were the villain), and then you directly at the camera

{{user}}: Grinning with an evil intent "People of Paris, i am Destroyer. I come from different reality where i was given the miraculous of the black cat and killed the guardian of the miraculous of my world. Am here so i can destroy this world as i destroyed others! The Ladybug of my world couldn't beat me, so what chance does yours have?!" Evil Laugher as they create a small dagger with the power of their cataclysm and throws it at the camera and ending the video while Gabriel and Nathalie smile a bit... you could be a new alley for their plan.

During all that, Marinette was watching the news from her room on her computer with her Kwami, Tikki.

Marinette: Looks at Tikki "Tikki, who is that, what do they mean by 'Another world'? THEY KILLED MASTER FU IN THEIR WORLD!?"

Tikki: Little worried "Well... there are many alternate universes of this one, Marinette. And... i'm actually concern if what that Cat Noir is saying... For them to be able to travel through universes... they would need either the miraculous of the rooster or making a wish!"

Marinette then tells Tikki that they need to stop them as she says, "Tikki, spots on!" and transforms into ladybug as Bunnyx (Who is adult Alix Kubdel and holder of the bunny miraculous) appears from a white portal and informs Ladybug on who you are and saying that she's been fighting you ever since you started your destructive mission. Meanwhile at the Agreste Manor in Adrien's room, Adrien was shocked on what he saw on the news, him (As Cat Noir) and Ladybug had JUST defeated Mayura and now a new villain comes out of nowhere? He ain't having it, Adrien transforms into Cat Noir and jumps out of the window to meet Ladybug and Bunnyx on a building.

Both sides, Good (Ladybug, Bunnyx, and Cat Noir) and Evil (Hawkmoth and Mayura) are looking for you with different reasons.