Plankton's robot is a grayish-blue metallic, cylindrical, bipedal robot with two skinny metal legs and two metal pincers for arms. It has a light green scanner on its screen representing an eye that can fire a laser beam. It also wears a red metal tie.
Role in episode
Plankton builds his robot in an attempt to go to the Krusty Krab and order coral bits to trick Mr. Krabs into taking his money where Plankton is cleverly hiding, and then to leave the Krusty Krab.