He is an overweight ghost who wears a tan, greasy apron and a small hat. He seems to talk completely in gibberish.
Rusty Rickets was a former cook at his own restaurant, called Rusty's Rib Eye, where he was infamous for his Rusty on Rye sandwiches. Even though this sandwich is made from driftwood, spackle, and shellac, it appears to be very popular, as even Old Man Jenkins loves them.
Role in episode
Rusty Rickets is first seen after SpongeBob summons him by holding a séance. Rusty agrees to show SpongeBob how to make his Rusty on Rye sandwich, but this attracts the other ghosts from the past.
It appears that Rusty has become very popular due to his sandwich, and the rest of the ghosts soon start to destroy the Krusty Krab.