Doctor Kojiro Peppa
Playing Favorites.png
Vital statistics
Title The mad doctor
Gender Male
Race Human (Japanese descent)
Faction Evil
Health Unspecified
Level Unspecified
Status Deceased (presumed—body has not been recovered)
Location Unknown

Dr. Kojiro is a devious roboticist who has clashed with Mega Man on several occasions. He is best known for having created Tempo, though almost as well known for his eccentric hairstyle and insidious behavior in life.


Born in Japan, Kojiro Peppa, the person who would eventually come to be known as either Dr. Kojiro or Dr. Peppa was a fan of both Dr. Light and Dr. Wily, and eventually enrolled in the Robert University of Technology, obtaining his PhD in electronic engineering and physics. He was a firm believer in the use of robotics to serve mankind, although he did not really consider them deserving of their own rights—however, he did find giving them their own personalities less than dull. He became a member of the World Robot Alliance, and when he learned of the 1st Annual Robot Tournament, he enthusiastically entered, enrolling his first robot master, Funnel Man, into the tournament. While he did not place within the top 8 competitive positions, he was there to witness the reprogramming of the top 8 robots to serve Mr. X. Kojiro was able to recover Funnel Man and repair him. However, it is believed that during the rescue attempt of his favored machine he took a hit to the head that gave him a concussion and altered his personality, unlocking his darker inner feelings and slowly converting him into a malicious villain.

Kojiro began to live a double life, funding his own projects by operating under the guise of another individual to sell specialized robot designs to contractors, wearing specialized robots to appear to alter his physical body enough to make others assume he was not Kojiro—these robots included leg extensions to make him appear taller, a body suit robot to make him appear overweight and slightly hunched, a hair piece robot to hide his typical hairstyle and a cane to hold himself up. One of his legs was purposefully built differently than the other to give him a minor limp. This was done so that he could attempt to conquer the world without risking his source of income. The robot masters he built for people were on a number of occasions used to do battle with Mega Man, and those were ordered to slay all those who had bought it and worked alongside of it in order to cover up its origins.

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Kojiro is considerably more malicious in intent than Dr. Wily has been, and does not feel any qualms about stealing other's technology (Gladius Man and Rush Man being two prime examples) but also being willing to murder individuals to free up an extra robot master for fighting. Alongside his typical eight robot masters he sends out to wreak havoc, he always has a specialized bodyguard built to protect him, should Mega Man breach his offenses. These bodyguards are known as the Scovillains, and are themed after peppers.

He is believed to have been slain during the Cataclysm, although his corpse was never recovered.


  • Dr. Kojiro Peppa's name stems originally from the soft drink "Dr. Pepper", as a running gag—Kojiro was chosen as his first name to denote Japanese heritage. Later, when he was transformed into a serious character, he took on his first name for his title, but the idea of Peppa (originally Pepa) remained, and is most evident in his bodyguards, which are still based on and named after peppers themselves.

List of Kojiro's Robot Masters

The following is a list of Kojiro's many robot masters, in order of construction.

Silhouettes of the bosses seen in Mega Man K1.

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