16 sources Batman Beyond - Season 3, Episode 7 (11 Nov. 2000): "The Call: Part 1"Batman: Harley Quinn (Oct. 1999): "Harley Quinn" Batman: Streets of Gotham #1 (Aug. 2009): "Ignition" Batman: The Animated Series Captain America: Red, White & Blue (Sep. 2002): "Origin" Detective Comics (vol. 1) #841 (Apr. 2008): "The Wonderland Gang!" Gotham City Sirens | 13 characters
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