Joker is the main villain of Batman: Arkham Asylum and Batman: Arkham Origins, and it’s debatable ... as evidenced by Batman’s Detective Mode not perceiving a skeleton within his body.

In The Penguin Episode 4, the creators intentionally chose to exclude classic villains Joker and Harley Quinn ... and her journey within Arkham Asylum. She explained, “Honestly, for that ...

While in The New Batman Adventures, it was showcased that Harley fell in love with Joker after being his psychologist, the film subverts her origins ... is now spending time at Arkham.