The Kleek (known as PAK Dwelers on Irk, making many believe that they are parasites native to Irk), are a peacefull supercivilization from Kleek Prime, in the Monterain System. Since they are thought to be parasites, Irkens have made multiple products to get rid of them (all though none work). One of these is a PAK Dweller repel that tries to keep them away with a rancid smell. However, this does not work at all, as Kleek cannot smell.
Kleek are small, mammalian creatures with really big ears and eyes. They are about the size of squirrels, and are covered in grey fur. They also have wings.