Nellie Penguin appeared in the introduction for the Mopatop's Shop episode "Hug a Bug", where Mopatop suggested the viewer try a pair of green wellies. They turn out to be Nellie's wellies -- and they're quite smelly, since she uses them to store her fish. She is a recycled version of one of the members of Nicky Napoleon and His Emperor Penguins from Little Muppet Monsters.