Dead Eye Plankton was an antagonist in the 1800's. He is the main antagonist in the episode "Pest of the West." He is one of Plankton's ancestors. Dead Eye Plankton was arrested and thrown in jail after he was defeated by SpongeBob's great cowboy ancestor, SpongeBuck SquarePants at high noon by stepping on him. There was a song named after him called "Dead Eye."
Dead Eye Plankton looks similar to Plankton. He wore villainous cowboy clothes and a stovepipe top hat. Even though he is quite small, everyone was still scared of him except SpongeBuck SquarePants.
When Pecos Patrick stated that he was from the East, this could mean that rich people from the East Coast usually overpower the western people at that time.
Dead Eye makes records for "driving a sheriff out of town." In this episode, he was only a few seconds off his record.
Burger King made a toy version of him. The differences between the toy and the Character are: the toy's mustache is smaller, the toy does not have a bow tie, and the toy's hat is more like a top hat the character.