After trademarking Mr. Monster, Gilbert heavily revised the character, creating a horror/humor hybrid which often featured heavy satire of both the horror genre and superhero comics in general.

[2] The revised character first appeared in Pacific Comics Vanguard Illustrated #7, dated July 1984.

They offered Gilbert the opportunity to give the character a title of his own, initially planned as a January 1985 one-shot reprinting and completing the Vanguard storyline.

[4] Eclipse also published a series of specials starring Mr. Monster,[5] and later a crossover issue pairing him with Airboy.

[6] From 1988 Gilbert left Eclipse, instead taking the character to Dark Horse Comics.