The germ-loving scientist Dr. Tobar planted them inside Donald Duck's brain as part of his plan to spread germs to infect others. Tobar walked Donald's body to the stadium to initiate his plot. But Daisy Duck intervened before Donald could sneeze. At this point, Huey, Dewey, and Louie showed up, and Tobar turned the Germlings on them. Louie opened a bag of instant molten lava, and the resulting explosion destroyed the Germlings.