History of The Batman - The DC character Harley Quinn, created by Paul Dini and Bruce Timm, debuted in the 'Batman: The Animated Series' television episode “Joker's Favor” on September 11, 1992.
Gotham's New Character Ecco May Come From the Comics
Gotham's New Character Ecco May Come From the Comics
Ecco (with mask) by BatmanStalker21 on DeviantArt
Batman e Joker, ecco le novità e i misteri dei film Dc Comics | Wired Italia
Ecco | Batman Wiki | Fandom
Ecco fue inspirada en gran medida por Harley Quinn de' Batman: The Animated Series | •Gotham Amino• Amino