The Killer penguin (Eudyptes omnicidus) is a joke animal from Zoo Tycoon 2: Extinct Animals. They are based on the Emperor penguins from Zoo Tycoon. These penguins can kill any animal in-game, including the Lion, Tyrannosaurus rex, and the Orca (widely accepted as the three most powerful predators in the game), even though the Tyrannosaurus rex can kill it. They can be obtained sometimes if you fail the cloning minigame. The killer penguin resembles its cousin, the Rockhopper Penguin, but it has sharp teeth and glowing yellow eyes, as well as hair that is not the same. The glowing yellow eyes makes it looks like it is possesed.
The Killer Penguin isn't as bad as the Zoopedia on the game says. And it could get you lots of money. And when the guest donates to a Killer Penguin exhibit on thoughts it says:"I wonder if i give the penguin money,will it be nice to me?" Strangely, it says its biome is not suitable when it is in its correct biome, but don't worry, it's satisfied.
The killer penguin is a reference to a glitch in the first Zoo Tycoon game, in which Emperor Penguins were able to kill animals they shouldn't have been able to kill, like zebras. However, the Killer Penguin more closely resembles a gigantic prehistoric possessed Rockhopper Penguin than an Emperor Penguin. It is also possibly a reference to the crazy penguins from the Madagascar films, especially considering the Zoopedia states that it is from Madagascar. Sometimes, the killer penguin will replace the scientist in the lab. According to its Zoopedia article, it says if someone offers you a penguin for free, you should say no. Sometimes in challenge mode, somebody will indeed offer you a free penguin, which is really a killer penguin and should not be adopted. Killer penguins cannot be put up for adoption (most likely because nobody in their right mind would dare have it in a zoo) or released into the wild (unless they are very, very happy). The only way to get rid of it is for it to die somehow (Die of illness, die of old age, have something kill it, like a dinosaur). If you do not want the killer penguin in your zoo, but you got it anyway, while it is still in the crate select the bulldozer tool and notice that the crate is recyclable. This is because when you get other mistake animals from the extinct reaserch lab such as squirrels or butterflies their crates can be erased. According to the Zoopedia, they "Enjoy sunsets, long walks on the beach, and pecking things to death."
There is a hack at Zoo Tycoon Volcano which makes them adoptable. However, the hack contains a glitch that makes Killer penguins swim on land.
Also if you create a Squirrel through a similiar lab glitch, and place it in the Killer Penguin's exhibit, the penguin's status shows "Running from Squirrel", which is strange considering that it has the ability to kill virtually any other animal in the game, even the carnivorous dinosaurs, and yet it is afraid of a harmless squirrel.
There is a placable killerpinguin by Thomvonder, you can download it at zootycoon.nl
In the cloning mini game, sometimes a killer penguin will be standing there rather than the normal scientist.(Which to unsuspecting players is SCARY!)