The Penguin Ghost is ghost that resembles a penguin.
Spooks Away, a rival company of the Ghostbusters, used a Prediction Engine fueled by entities to see the future and steal equipment before it was built. Ray Stantz was shown one that took place 24 hours later of Peter Venkman and Winston Zeddemore blasting a Penguin Ghost at the Bronx Zoo. Ray realized that was how Spooks Away was poaching their jobs before they could show up.
The Penguin Ghost is a Class 5 Corporeal Apparition.