He is a computer who analyzes whatever is inputted, designed to detect the Krabby Patty secret formula. He is made up of many different pieces of equipment that aid in detecting the Krabby Patty formula.
Role in episode
He is made by Plankton as a way to detect Krabby Patties to the "smallest molecule of a Krabby Patty." This, however, backfires when Plankton accidentally pushes the switch to start it, accidentally sucking him in. He then goes through the many pieces of equipment. The Analyzer outputs that Plankton is made of "30% mean guy," "20% spiteful monster," and "50% evil butt-head," which from here he concludes that the sample is "100% big jerk."
The Analyzer then praises Karen's new screensaver. Plankton, being fed up with him, destroys him with a wrench.
Plankton was previously analyzed as "1%, evil 99% hot gas" in the episode "Plankton!"