Nintendoitis

A condition very common among 8-bit games, but can be applied to any game in which this happens, even if it's not a Nintendo game. It is a condition in which an enemy that was just killed would respawn in the same place if the screen scrolled to the left and then back to the right (or right then left). This condition is most prominent in games like Super Mario Bros. 2

Hey, I just killed that guy! He came back while I was going for that 1up! This game has Nintendoitis bad.