Zen the Intergalactic Ninja is a fictional character created in 1987 by Steve Stern and Dan Cote, and initially published under their Zen Comics imprint. In the early nineties Zen was licensed to Archie Comics, and then to Entity Comics. Zen became a popular cult comic inside the comic book community at a time when comic books where becoming more mainstream.
The comic was later adapted into a video game for both the Nintendo Entertainment System and Game Boy in 1993 by Konami. The games feature Zen fighting an alien villain known as Lord Contaminous, who is keen on harming the Earth's ecological environment. The music for the NES game was composed by K. Nakamura and has been played on the Swedish radio-channel P3's programme Syntax Error.
Source: Wikipedia, "Zen Intergalactic Ninja", available under the CC-BY-SA License.