In Batman: Arkham City (2011), you can find Harley Quinn's outfit from Batman: Arkham Asylum (2009) in Joker's Fun House, complete with Warden Sharp's ID tag. : r/GamingDetails
Harley quinn costume hi-res stock photography and images - Alamy
Batman: The Animated Series - Harley Quinn 1/6 Scale Figure – Mondo
Batman: Arkham City Harley Quinn Costume
Batman: The Animated Series - Harley Quinn 1/6 Scale Figure – Mondo