Tweedledum and Tweedledee first appeared in Detective Comics #74 (April 1943), and were created by Bob Kane, Jerry Robinson and Don Cameron.

The pair are known as Tweedledum and Tweedledee, both as a play on words on their real names, and because they resemble John Tenniel's depictions of the characters in Lewis Carroll's Through the Looking-Glass.

[5] In "Infinite Crisis", Tweedledum and Tweedledee join Alexander Luthor Jr.'s Secret Society of Super Villains.

[6] The Tweeds later become the leaders of the Wonderland Gang, using one of the Mad Hatter's mind control devices on him to exploit his notoriety.

[8] Tweedledum and Tweedledee have no superpowers, but their fat bodies enable them to bounce and roll at high speeds.