He looks like Mr. Krabs, but taller. His head is green and has one eye with two antennae on it. His claws and legs are red.
Role in episode
He is created when Plankton uses DNA from his antenna and Mr. Krabs' hair. He plans to use PlanKrab to simply steal the Krabby Patty secret formula. PlanKrab easily steals the formula, but he also takes over the Krusty Krab, kicks Mr. Krabs out onto the streets, and brainwashes Squidward and SpongeBob. He reveals that he did it all by using his soothing handshake. He then uses his handshake on Plankton which causes him to take over the Chum Bucket as well. PlanKrab puts the two restaurants together, creating the Krusty Bucket. Plankton and Krabs realize they must work together in order to get their restaurants back, but after many failed attempts they decide to work for PlanKrab instead. PlanKrab gives them the job as bathroom managers. This causes Krabs and Plankton to start arguing and fighting.
When PlanKrab sees the two arguing, he doesn't know who to side with and splits into two PlanKrabs (Red PlanKrab and Green PlanKrab) and start arguing with each other as well. Krabs and Plankton then have the two PlanKrabs shake hands with each other, causing them both to melt away as well as getting rid of PlanKrab for real.
He speaks with an exaggerated pirate accent, even more so than Mr. Krabs.
He is technically the biological son of both Plankton and Mr. Krabs.
Therefore he is a member of both their families.
He does not share Mr. Krabs' cheap nature.
However, he does share Plankton’s evil side.
He has two different laughs, a Mr. Krabs laugh and a Plankton laugh.