The Chumporium was a temporary replacement for the Chum Bucket. It appears in the episode "New Leaf". It only sold items and trinkets.
The Chumporium looks exactly like the Chum Bucket, except that it has been turned into a gift shop. It has a large yellow poster covering the word "Chum Bucket" on the outside that reads the place's name in green capital letters. Underneath, in blue, it says "Grand Opening." The glass doors lead into the inside of the Chumporium.
Role in series
The owner is Plankton, who had been running the Chum Bucket for years. Its only known customer is SpongeBob, who bought a snow globe. Suspicious, Mr. Krabs confiscates SpongeBob's snow globe and throws it into his storage with Plankton's other past ideas used to get to the Krabby Patty formula.
Mr. Krabs, after throwing a party, notices Plankton walking out of the Chumporium with a seal plush-doll, becoming more suspicious. He looks through a window and is shocked at what he sees inside. Unconvinced, he gives Plankton a war. It may not have been a success, but Plankton had loved his gift shop and was heartbroken when Mr. Krabs went on a rampage.
Plankton tries to act as if he was not trying to capture the Krabby Patty secret formula but Mr. Krabs proves smarter. Plankton later tears down the store sign and brings back the Chum Bucket.