Patrick's conscience is a character who appears in the episode "Patnocchio."
He looks just like Patrick, except he is very small, green, and wears more formal attire, including a blue top hat with a yellow stripe and black coat.
Role in episode
He comes in at the end of the episode when Plankton, disguised as Patrick's conscience, is stealing a Krabby Patty. He tells Patrick that he is his real conscience, explaining he woke up late, while Plankton is shocked to see him. Patrick then asks who the other conscience is. Patrick's conscience says it is a bug taking advantage of him, at which point Patrick and his conscience begin to stomp on Plankton for his actions.