Please note that although the final product will be manufactured to be as close to the anime version of the costume as possible, there may be small disparities between the two. Surveyors found 11.2 percent of pet costume buyers plan to dress up their animals as pumpkins, making it the most popular pet costume out there. Also will travel to other California cities by train. The series opens on Harley (voiced by Kaley Cuoco) being abandoned at a crime scene by The Joker (Alan Tudyk), which results in her getting thrown into Arkham Asylum.