He is the polar opposite of the mainstream continuity's Joker. Unlike the Joker from Earth, Bizarro-Joker is normally very sad.
Major Story Arcs
The Mark of Bizarro
For more information see: The Mark of Bizarro!
This version of Bizarro-Joker is not white faced like the rest of Bizarro World and is always crying and sad. He mentions he's the only sane one on the whole square.
Escape from Bizzaro World
This version of Bizarro-Joker is like the rest of Bizarro World, white faced. He is seen being held prisoner in Arkham Amusement Park.