this isnt the most serious suggestion but my brain thought of it while in a dream :P
Counterfeit
1 in 6 chance for the Joker to not trigger when it is supposed to.
it doesnt play any sound effect or animation when u discover it like all other editions, nor does it have a label saying its counterfeit, but there is a slight color contrast difference if u look closely.
on the left is a 100% real genuine authentic Jimbo, and on the right is the deceitful and malicious counterfeit Jimbo .... be mindful out there friends !