is the riddler and the joker the same character
Riddler The fallout from the Riddler's failed scheme is played out in Batman: Gotham Knights #50-53. In the story "Pushback", Hush reappears and beats Riddler senseless across a rooftop. Seeking refuge, Riddler goes to the Joker and the Penguin. He offers to tell the Joker who had killed his pregnant wife Jeannie if the Clown Prince of Crime would protect him from Hush. Joker immediately agrees, but eventually Hush, with the help of the impostor Prometheus, defeats him, forcing Riddler to flee for his life.
Arkham Knight The Arkham Knight harbors a deep-rooted grudge against Batman, and fully intends to kill him after making him suffer. To this end, he has aligned himself with the Scarecrow, and provides a military presence in the evacuated city of Gotham during the events of Batman: Arkham Knight. Towards the end of the game's main story, it is revealed that his true identity is Jason Todd, the former and second Robin, who was thought to have been killed a long time ago by Batman's nemesis, The Joker. He is voiced by Troy Baker.