Mr. Penguin is a stuffed penguin that can be found in Panda's room amongst the plethora of stuffed animals he owns. It made its first appearance in the episode "Hibernation".
Mr. Penguin is, of course, black and white. It has comically large eyes and simplified shapes in place of the beak and feet, which are both dark orange. It is made from a textile and is likely stuffed with cotton.