Second Life Marketplace - [MD] Poses - Harley Quinn (with Baseball Bat)
Review - Harley Quinn #36: Harley Bat - GeekDad
Birds of Prey': Black Canary Is Taking Harley Quinn's Baseball Bat
In Suicide Squad (2016), the writing on Harley Quinn's baseball bat is a quote from her first appearance in Batman: The Animated series, specifically the Episode “Joker's Favor”. : r/MovieDetails