Real name: Bugs Norton
First Appearance: Detective Comics I#43 (September 1940)
Abilities: knows politicians
Weapons: city government
Quotes: "If the Batman comes looking for trouble, he's going to get it!"
Worst Act: Corruption
Created by: Bill Finger (writer) and Bob Kane (artist-credited), Jerry Robinson/George Roussos(inks)
Superheroes tackling corruption in politics wasn't new (Superman made pretty much his first year going after lobbyists and others), so it's a bit odd that Batman would take so long before going after such a figure.
The story has been before (and after too), hero blows into town run by a corrupt boss figure and by various means ends up saving the simple townsfolk. That's pretty much the entire story, as Bugs Norton is the power behind the mayor Harliss Greer and Batman takes them down. The use of messages via bat is a fresh twist though.