SpongeBob and Patrick are at the bi-annual jellyfishing convention. While Patrick touches every display in sight, much to the dismay of the security guard, SpongeBob sees the "Jellyspotters", the world's premiere jellyfish enthusiast club, whose membership consists entirely of Anchovies, with the exception of their leader, Kevin the Sea Cucumber. SpongeBob continuously tries to get Kevin's attention, and Kevin tells him to jump off a building, which he actually does. Realizing that he'll do anything for him, he asks SpongeBob if he wants to join the jellyspotters, to which he excitedly says yes. Kevin tells him that he must first pass a "rigorous test", intending to get him hurt.
At Jellyfish Fields, Kevin's first test for SpongeBob is to catch a jellyfish, which immediately flies into SpongeBob's net. Kevin smacks it out and it stings him. He says to catch two jellyfish, and two jellyfish fly into SpongeBob's net. Kevin then says 20 jellyfish, and then 18 jellyfish fly into SpongeBob's net. Angry, Kevin kicks the net, making all the jellyfish sting him. Kevin continues to give SpongeBob many more "tests", all of which he passes effortlessly, with Kevin getting stung each time as a result.
Eventually, Kevin, now covered in stings and frustrated at SpongeBob, tells him that his final test is to catch a queen jellyfish. They tie him to a post, give him a "queen jellyfish call", which produces the sound "loser", and leave him there. Four hours later, SpongeBob is very tired and prepared to give up. He tries to tell Kevin that the call isn't working, but finds that he is gone. Suddenly, a queen jellyfish appears above SpongeBob and begins chasing him. Eventually, the queen corners him at the edge of a cliff, where it is revealed that it is a robot controlled by Kevin and the anchovies, who reveals his true intentions to SpongeBob and shows him several other people at the bottom of the pit below, who were his former "biggest fan"s. Before he can force SpongeBob off the cliff, however, King Jellyfish appears and falls in love with the queen jellyfish. He tries to kiss her, and they all start running away. Soon, the queen jellyfish crashes into a billboard, destroying it. When King Jellyfish sees this, he becomes angry and chases down SpongeBob, Kevin, and the anchovies, eventually cornering them in a cave. Kevin panics, and admits that he has no actual expertise in dealing with jellyfish (because he was just in it for the fashion) . SpongeBob is the only person brave enough to confront him, and blows a giant pie bubble, which King Jellyfish takes and leaves. Kevin asks how was he able to do it. SpongeBob simply answers "Everyone loves pie!". The anchovies congratulate SpongeBob for saving them all, but Kevin says that SpongeBob is still not in the club because he did not catch a queen jellyfish. The anchovies think that SpongeBob is a more worthy leader than Kevin, and tear off his headcap, giving it to SpongeBob as a "crown".
Back to the convention, SpongeBob tells Patrick about his experience, and reveals that he turned the Jellyspotters' offer down. Patrick says that he's glad SpongeBob learned his lesson, and that hero worship is unhealthy. He then walks off dragging his own hero, Jeffrey Jellyfish, who is tied up in a wagon.
( ‣ ) Associated production music
( • ) Original music
( ◦ ) SpongeBob music
• ? - Sage Guyton, Jeremy Wakefield [title card] ‣Candy Floss - Peter Dennis [opening] ‣Awakening Memories - Paul Fenoulhet [The Jellyspotters] ‣Witty Fellow - Gerhard Trede [Kevin answering questions] ‣Comic Walk - Sidney Torch ["Look, I won't let the guy join the club."] ‣ ? ["I'd love it!"] ‣Alex on the Road - Steven Simmons [driving through Jellyfish Fields] ‣Me for You - George Callert [SpongeBob passing Kevin's tests] • ? - Sage Guyton, Jeremy Wakefield [montage of Kevin getting stung] ‣Tomfoolery - David Snell [catching a queen jellyfish] ‣The Great White - Gregor F. Narholz [queen jellyfish appears] ‣Action Cut A - Gregor F. Narholz [Kevin's gone] ‣Killer on the Run A - Gregor F. Narholz [queen jellyfish chases SpongeBob] ‣Witty Fellow - Gerhard Trede [Kevin inside robot jellyfish] ‣Rule Britannia (a) - Dick Stephen Walter [king jellyfish appears] ‣Good Bye Samba A - Ben Nabor ["Kissy face!"] ‣Killer on the Run A - Gregor F. Narholz [Jellyspotters hide in a cave] • ? - Jeremy Wakefield ["It's hopeless! We're trapped!"] ‣Triumphant Return 1 - Gregor F. Narholz [SpongeBob blows a pie-shaped bubble] ‣Witty Fellow - Gerhard Trede [Kevin's scalp ripped off] ‣Candy Floss - Peter Dennis [ending]
Running gags: Patrick touching stuff, with the security guard telling him not to; one of the Anchovies saying, "Wah, wah, waaah" after Kevin gets stung, and Kevin getting shocks by jellyfishes.
Kevin appears in the video game, SpongeBob vs. The Big One: Beach Party Cook Off as a boss challenge.
After Kevin was stung by twenty jellyfish, an anchovy saying, "wah, wah, waaah," was heard, but none of the five anchovies accompanying Kevin were opening their mouths.
Lists of tests Kevin gave:
Catch a jellyfish
Catch two jellyfish
Catch twenty jellyfish
Allow jellyfish to eat jelly off your face
Catch a jellyfish blindfolded
Catch a jellyfish while standing on your head
Catch a queen jellyfish
Six other tests
This episode may take place between the events of I Was a Teenage Gary, as SpongeBob and Patrick went out of town to go to a jellyfish convention and were not seen anywhere else other than Jellyfish Fields. However, It might not as the convention in the previous episode is annual, and this one is bi-annual.
Kevin said that he doesn't use bamboo to the jellyfish nets. Although, he and the anchovies have bamboo nets, as seen when they reach in Jellyfish Fields.
A statue of Kevin can be seen in Nicktoons Unite.
There are "Kevin's Ointment" billboards throughout the episode and they are also seen in a few video games.
If this takes place between the events of I Was a Teenage Gary, then, this is the only episode not to have any part in Bikini Bottom
Dr. Manowar was said to be the only person who was stung by Big Lenny and lived. This could be a reference to the Harry Potter series in which Harry was the only known person to survive a killing curse.
SpongeBob's obsessive need to repeat "Hi Kevin" during the convention is in direct correlation to Season 4 Episode 6 of "The Wonder Years" in which Debbie Pfeiffer, Paul's sister, follows around Kevin Arnold saying "Hi Kevin" using the same mannerisms and dreamy tone of voice.
SpongeBob's mention of touching the hem of Kevin's pocket protector is a reference to the Bible, in which a desperate woman brushed the hem of Christ's cloak to heal her disease (Luke 8:43-48).
A banner in the background of the convention says, "Got Stung?", a reference to the "Got Milk?" phrase.
When SpongeBob looks at the bottom of the cliff it's grass but, later he looks down again there is another edge and people stranded at the bottom.
During the credits, when Sirena Irwin's name is shown, her last name is accidentally spelled "irwn."
After Kevin got stung by the 20 jellyfish, one of the anchovy said: "wah wah wah." but his mouth did not move
In one scene, the sky is red but in underwater, the sky is blue.
After Kevin and the anchovies are laughing at Spongebob in one scene, Kevin's voice changed.