Doctor Einmug is an atomic scientist who developed an atomic power formula. He first appeared in Floyd Gottfredson's "Island in the Sky" in 1936-1937, and later was used quite frequently by Romano Scarpa. In the USA, Doctor Einmug has appeared only in MM "Island in the Sky" (MM Best Comics #1, WDC #1, WDC #582) and in Mickey Mouse Adventures #17 & 18, "A Snatch in Time" (Oct. 1991), In "Island in the Sky" Mickey Mouse meets Dr. Einmug for the first time, and visits his island which floats high in the clouds. Pete covets the ingredients of that formula, and attempts to steal it.