Lunatik first appeared in Creatures on the Loose #35-37 (May-September 1975), and was created by David Anthony Kraft and George Pérez.
The character subsequently appears in Defenders #51-53 (September-November 1977), #55-56 (January-February 1978), #61-62 (July-August 1978), #64-65 (October-November 1978), Marvel Premiere #45-46 (December 1978, February 1979), and Defenders #70-73 (April-July 1979).