Plankton's cousins are a part of Plankton's family that first appear in the episode "Plankton's Army." They appear and act in the manner of a modern hillbilly. The majority of them can read except for one, Clem. Unlike Plankton, they are not evil. They want rewards if they help Plankton, such as memory for their laptops, an extra string for a banjo, matching boots, and all of them want root beer.