Shy Guys (sometimes formatted as Shy-Guys[1]) are timid troublemakers and common enemies in the Mario and Yoshi series. They are famous for the masks they wear. They made their first appearance in Yume Kōjō: Doki Doki Panic, a non-Mario game; they were later carried over to the Mario universe when Super Mario Bros. 2 was created. Shy Guys usually work for Bowser and the Koopa Troop, but they origi