Shirt, choker belt from Hot Topic. Shirt hand painted by me for dye drip affect.

Wig:

Bat, gun holster, boots and spike bracelets bought second hand

Yes sir cuffs: https://www.etsy.com/listing/468798926/harley-quinn-yes-sir-bracelets-from?ref=shop_home_active_9

Booty shorts:

Tattoo leggings: https://www.etsy.com/listing/465770096/harley-quinn-cosplay-harley-quinn?ref=shop_home_active_6