What is miraculous ladybug season 2 episode 6?

Miraculous Ladybug season 2 episode 6 is titled "Robostus". In this episode, Marinette tries to fix Alya's phone after it is damaged during a battle with villains. However, the phone ends up being taken over by a villain called Robostus. With the help of Ladybug, Cat Noir, and Alya, they must stop Robostus before he destroys the city. Additionally, this episode also features the introduction of a new superhero, Rena Rouge.