The check-in lobster is a character who appears in the episode "The Nitwitting."
He is a large red lobster who closely resembles Larry the Lobster, except that he has normal white eyes instead of small greenish-yellow eye stalks. He wears a black suit over a white dress shirt with a black bow tie. He also wears a small red propeller hat like the other members of the Empty Head Society.
Role in episode
He checks-in Howard Blandy's, SpongeBob's, and Patrick's brains before they enter the Empty Head Society. He also participates with the other members in the "Nitwitting."