Mega Man

Mega Man is the protagonist of a famous video game series of the same name. He also made appearances in the Mario series, but only in the Club Nintendo comics.

In 1992, he was introduced in "Super Mario: Die Bescherung". In this comic, he joins Mario and Luigi's Christmas party, without affecting the story in any way. His first and only major appearance was in the 1993 comic "Super Mario: Die Verwandlung", where he served as Dr. Light's assistant. Besides taking care of the doctor and welcoming his visitors, Mega Man also drives the car they use for catching Wario.

After 20 years of not appearing in any Mario-related media, Mega Man was confirmed to be a playable guest character in the upcoming Super Smash Bros. for Nintendo 3DS and Wii U.

Trivia

 * In the comic "Super Mario: Mario im Wunderland", Kirby mentions that he wants to look like Mega Man.
 * Mega Man series creator Keiji Inafune took some level of inspiration from Mario when designing his own series.