"[2] Some of the humor draws from hip hop culture, and the dialogue sometimes incorporates English phrases.

"[2] The comic has been translated to Norwegian, Danish, Finnish, Serbian, English, Spanish, and French, either as a running strip or collected in book form.

Kellerman created Rocky after his girlfriend broke up with him and he was fired from his job as a cartoonist for a pornographic magazine.

He decided to draw a comic strip about his current situation to entertain himself and his friends and did not initially take it seriously.

[4][5] Kellerman also publishes Rocky as a magazine, featuring comic strips and other material, including interviews with hip hop artists such as 50 Cent, M.I.A.