- I'm here for the entertainment! I've managed to infiltrate your little renovation process. The Hall of Justice is now The Joker's Playhouse!
- — Joker src
The Joker infiltrated the Super Friends' Hall of Justice during its renovation and, with the help of Gorilla Grodd and Mister Freeze, attempts taking the team down. Having his other plans foiled, The Joker faces the Super Friends with a mecha robot version of himself as a last stand. Just when he seems to be winning, the Super Friends reach the conclusion they have to work as a team and eventually defeat him. The Joker is later taken back to Arkham Asylum by Superman.
- This version of the character is exclusive to the continuity of the film The Joker's Playhouse and is an adaptation of Joker. The original character was created by Jerry Robinson, Bob Kane, and Bill Finger and first appeared in Batman #1.
- The Joker was voiced by John Kassir.
- Appearances of Joker (Joker's Playhouse)
- Images featuring Joker (Joker's Playhouse)
- Quotations by or about Joker (Joker's Playhouse)
- Character Gallery: Joker (Joker's Playhouse)