Kartons are the race of cyborg lizard monsters who normally from outer space. They eat aliens and sometimes are fond of heat and are attracted to a heat source much like bees are attracted to nectar, because they are cold-blooded. The Kartons having burned their own planet to get more heat, are nomads who travel through space seeking more to burn. They keep a flock of five-horned rhino-like creatures, two-headed kangaroo-like creatures, and three-headed flamingo-like creatures on their ship, presumably as food.

The kartons are ruled by a leader who is many times larger than a normal karton (most kartons are slightly larger than other aliens). Their leader is also intelligent and able to talk, like the rest of the kartons.