Sabu (Kunio Kun)

Sabu is a villain in the Kunio Kun Japanese video game series.

Nekketsu Kōha Kunio-kun
Sabu is the leader of a Tokyo gang known as the Yakuza. He is responsible for harming the protagonist's friend. The protagonist, who is named Kunio, seeks vengeance. He is confronted by three other gangs during his search for Sabu. They are defeated and Kunio finds the Yakuza's headquarters. He infiltrates the building and confronts Sabu. During the battle, Sabu uses a gun to kill his enemy. Kunio defeats Sabu and gets his revenge.

Kunio-tachi no Banka
Sabu returns as the main antagonist. He survived the previous battle and returns as leader of the Yakuza. Sabu hires a man named Ken who resembles Kunio. Ken performs a hit and run accident to frame Kunio. The authorities jail Kunio for the accident but he manages to escape prison. The next day he is reunited with his girlfriend, Misako. They search Tokyo for information about the crime. Eventually, they encounter Sabu and Ken. Sabu reveals the truth before shooting Misako. She is taken to the hospital by the police who pardon Kunio after they discover the truth. They manage to locate Sabu's hideout and send Kunio. He enters the place and is forced to eliminate the Yakuza gangsters. Kunio finds a mansion and enters it. There, he encounters Ken yet again. This time, they engage in a battle. Ken dies right before the mansion starts to crumble. in the next room, Sabu just activated a self destruction. He is confronted by Kunio and is challenged to a rematch. Both of them fight but Sabu is defeated. He dies in the destruction of his mansion. Kunio escapes and is reunited with Misako.