Fictional comic book stories about the Micronauts were first published by Marvel Comics (1979-1986). Micronaut action figures, vehicles, and playsets were depicted within the Marvel Universe with stories taking place in the Marvel's Microverse or "Inner Space," a universe accessed via the energy release via shrinking. The Micronauts often traveled to Earth, where the characters interacted with other Marvel heroes and villains.
A second series of stories were launched by Image (2002-2003). Devil's Due Publishing, which was in a partnership with Image, left Image and continued publication of these Micronaut stories in 2004. While both series had created characters unrelated to the toys, several characters based the likeness of the toys were common to both Marvel and Image /Devil's Due, including Baron Karza, Biotron, and Acroyear.