Back in 2017, the Batman comics displayed a showdown between the two in an event called the "War of Jokes and Riddles". This entry's riddle and its answer are meant to poke fun at the Joker.

Based on Batman: The Long Halloween #7 (April 1997), you can listen to the latest episode in its entirety above (and catch up by checking out the previous chapters below): Catwoman, The Joker ...