The stork is a character from the Mario series and the Yoshi series. In Super Mario World 2: Yoshi's Island, while delivering Baby Mario and Baby Luigi to their parents, the stork was attacked by Kamek. Baby Luigi was taken away, but Baby Mario was dropped onto the small island below. After that, the stork faced several charges including endangerment of infants and flying under the influence.
In Yoshi's Island DS, the stork plays a more active role in delivering Baby Mario, Baby Peach, Baby Donkey Kong, Baby Wario, and even Baby Bowser to Yoshi whenever need be.