What is the name of the Krusty Krab's rival restaurant?

The Krusty Krab’s rival restaurant is the Chum Bucket.

The Chum Bucket is owned and operated by Plankton and Karen, and it stands across the street from the Krusty Krab in Bikini Bottom. Its business rivalry with Mr. Krabs’s restaurant is one of the series’ most persistent storylines, although the Chum Bucket usually attracts very few customers.

The restaurant’s name refers to chum, a mixture of fish parts commonly used as bait. In the show, Plankton serves chum-based food that is generally portrayed as unappetizing or inedible. His real goal is not merely to improve the restaurant: he wants to steal the Krabby Patty secret formula, defeat Mr. Krabs, and make the Chum Bucket successful.

The other choices are restaurants or locations from the SpongeBob universe, but they are not the Krusty Krab’s principal business rival. The Flying Dutchman is a ghostly character, the Salty Spitoon is a tough sailors’ hangout, and Kelp Café is not Plankton’s restaurant.