The below are Harley Quinn's costumes from Injustice 2 offered at release. This includes any alternate costumes, game edition costumes, and the god and demon shader packs. Note that she is wearing her base armor in each picture.
Mad Love (default)
Mad Love (alt)
Demon
Demon (alt)
God
God (alt)
Hell on Heels
Hell on Heels (alt)
Joker's Moll
Joker's Moll (alt)
Sanity Check
Sanity Check (alt)
Waller's Jester
Waller's Jester (alt)
Images
Harley Quinn in Character Selection Screen
Harley Quinn Selection Icon
Harley Quinn's card in Injustice Mobile.
Animated Harley Quinn's card in Injustice Mobile.
Arkham Harley Quinn's card in Injustice Mobile.
Insurgency Harley Quinn's card in Injustice Mobile.
Harley Quinn Avatar costume for Xbox Live
Harley Quinn promotional Poster
Harley Quinn Promotional Render
Harley Quinn
IGAU Battle Arena - Harley Quinn vs. Wonder Woman
Harley Quinn in Archives
Insurgency Harley Quinn
Insurgency Harley Quinn in Archives
Arkham City Harley in Archives
Harley Quinn in the Classic Female Skin Pack
Classic Harley Quinn
Ame-Comi Skin Pack
Ame-Comi Harley Quinn
IOS Harley Quinn Card
IOS Harley Quinn
IOS Insurgency Harley Quinn Card
IOS Insurgency Harley Quinn
IOS Arkham City Harley Quinn
Harley Quinn vs. Batman
Harley Quinn's Super Move
"This'll be a BLAST!"
Arkham Harley vs. Arkham Catwoman
Harley Quinn's Epilogue
Harley and Ollie
Harley and Mr. J playing Doctor
Harley Quinn
Concept Art
Alternate Costume Concept Art
Concept art of Harley with her pet hyena Bud or Lou
Concept art of one of Harley's pet hyenas either of Bud or Lou