Joker (The Dark Knight) - Wikipedia
The Joker (DCAU), VS Battles Wiki
The Joker, Batman Wiki
Ace Chemical - Batman Wiki - Neoseeker
Joker (Prime Earth), DC Database
The Joker (Telltale Batman Games), Batman Wiki
The Joker, Batman Wiki
The Joker, Batman Wiki
The batman Arkham wiki was not lying when it said that Jokers design in Arkham knight looked quite different to his appearance in Arkham asylum, then again that was back in 2009