Sheldon J. Plankton/Appearances (Seasons 9-13)

This is a list of appearances of the character Sheldon J. Plankton in seasons 9-13 of SpongeBob SquarePants. In total, Plankton has appeared in over hundreds of SpongeBob-related products. On the main series, he has appeared in some form in 159 (not counting Welcome to Binary Bottom) episodes so far.

Bold means Plankton was the main character of and/or played a major role in that episode.

Italic means Plankton appears in a feature-length movie, a book, a video game, or a musical. It is also used for the titles of television shows that he appears in.

Episodes where Plankton cameos, appears in a deleted scene, appears as an entirely different character not related to him or appears in a time card or title card, as well as episodes where only his voice is heard, also count. However, episodes where he is an entirely different character that is nonetheless related to him (e.g. PlankBot in "Welcome to Binary Bottom") do not count on this page. Exceptions to this rule are if both Plankton himself and an entirely different character that's nonetheless related to him appear in the same episode or episodes that parody fairy tales, whereupon the characters essentially "play" otherwise entirely different characters (e.g. Plankton and the Beanstalk).

Season 9

Appearances in this season: 13 (including his cameo in "Squirrel Record")

#	Titlecard	Title	Airdate	Written by	Description	Screenshot
179		Squirrel Record	July 21, 2012	Luke Brookshier Marc Ceccarelli Derek Iversen	Sandy is determined to break a record number of world records, in record time, so SpongeBob joins her for an action-packed day of dangerous record breaking!
183		Eek, an Urchin!	October 27, 2012	Marc Ceccarelli Luke Brookshier Mr. Lawrence	The Krusty Krab crew have a problem on their hands when SpongeBob finds an urchin.
184		Jailbreak!	March 16, 2013	Marc Ceccarelli Luke Brookshier Mr. Lawrence	An imprisoned Plankton teams up with his fellow inmates to break out of jail and steal the Krabby Patty secret formula.
		Evil Spatula	March 9, 2013	Casey Alexander Zeus Cervas Blake Lemons Andrew Goodman	SpongeBob replaces his broken spatula with one from Plankton, which may or may not have magical powers.
185		It Came from Goo Lagoon	February 17, 2014	Marc Ceccarelli Luke Brookshier Derek Iversen Mr. Lawrence	Slime bubbles appear over Goo Lagoon, but Plankton wants to use them for his plans.
186		Plankton's Pet	January 19, 2013	Marc Ceccarelli Luke Brookshier Mr. Lawrence	After failing again to steal the Krabby Patty formula, Plankton gets a pet to cheer himself up.
192		Company Picnic	September 25, 2015	Kyle McCulloch Jack Pendarvis	Mr. Krabs holds the Krusty Krab's first annual company picnic, until Plankton comes up with his own.
196		Married to Money	May 3, 2016	Josh Androsky Daniel Dominguez	Mr. Krabs takes Plankton's advice and marries his one and only true love: money!
198		CopyBob DittoPants	May 5, 2016	Kaz	Plankton clones SpongeBob to steal the Krabby Patty secret formula, but his plans may be ruined by the original SpongeBob.
199		Lame and Fortune	July 11, 2016	Mr. Lawrence	When fortune cookies start predicting the future, Plankton changes them to fit his plans.
200		Goodbye, Krabby Patty?	February 20, 2017	Kyle McCulloch	SpongeBob and Mr. Krabs seek business advice from an ad executive in Mr. Krabs' endeavor to launch a line of frozen Krabby Patties.
203		Pineapple Invasion	July 14, 2016	Kaz	SpongeBob hides the Krabby Patty secret formula in his house, and Gary must protect it from Plankton.
		Salsa Imbecilicus	July 15, 2016		Sandy must save the day when a freak accident causes everyone in town to become as stupid as Patrick.

Season 10

Appearances in this season: 7 (including his cameo in "Whirly Brains"; Feral Friends does not count as he only appears in that episode's rough storyboard)

#	Titlecard	Title	Airdate	Written by	Description	Screenshot
205		Whirly Brains	October 15, 2016	Mr. Lawrence	SpongeBob and Patrick get hooked on the latest fad - flying your own brain like a tiny drone.
207		Mimic Madness	February 25, 2017	Mr. Lawrence	SpongeBob learns that "imitation is the sincerest form of flattery" — too bad no one told him how to stop!
		House Worming		Richard Pursel	When worms move in to SpongeBob's holes, it is up to him to hide his disgusting new friends from everyone else.
209		Plankton Gets the Boot	March 11, 2017	Ben Gruber	Karen does not want Plankton to stay at the Chum Bucket anymore, leaving it up to SpongeBob to teach Plankton how to make it up to her.
210		Burst Your Bubble	March 18, 2017	Andrew Goodman	Mrs. Puff is not pleased when SpongeBob blows himself a bubble boat.
211		Plankton Retires	March 25, 2017	Mr. Lawrence	Plankton decides to close the Chum Bucket and move to a new town, but Mr. Krabs still suspects he is up to something.
212		The Incredible Shrinking Sponge	December 2, 2017	Mr. Lawrence	SpongeBob must figure out how to do his job when he accidentally shrinks himself.

Season 11

Appearances in this season: 18 (including his cameo in "Surf N' Turf"; Fun-Sized Friends does not count as he is only mentioned in that episode)

#	Titlecard	Title	Airdate	Written by	Description	Screenshot
216		Cave Dwelling Sponge	September 23, 2017	Mr. Lawrence	When a prehistoric Sponge is unfrozen, he causes chaos all over town – and only SpongeBob can communicate with him.
217		Spot Returns	June 24, 2017	Andrew Goodman	After his pet amoeba Spot has puppies, Plankton decides to use them in another of his nefarious plots.
218		Spin the Bottle	July 16, 2017	Kaz	Plankton poses as a wish-granting genie in his latest scheme to get the secret formula.
220		The Legend of Boo-Kini Bottom	October 13, 2017	Mr. Lawrence	The Flying Dutchman wants to make sure SpongeBob is scared on Halloween.
221		No Pictures Please	November 6, 2017		Patrick leads an enthusiastic stranger on a tour of his favorite places in Bikini Bottom.
222		Krabby Patty Creature Feature	October 21, 2017	Chris Allison Ryan Kramer Kaz	A new secret Krabby Patty formula has disastrous results for Bikini Bottom, and only SpongeBob can save the day.
		Teacher's Pests		Ben Gruber	Mr. Krabs and Plankton have to take boating school classes.
228		Grandmum's the Word	February 16, 2018	Mr. Lawrence	Plankton tells his grandma that he owns the Krusty Krab, but must keep the lie going when she comes to visit.
230		Bottle Burglars	April 13, 2018	Luke Brookshier	SpongeBob and Squidward accidentally let Plankton slip away with the formula, and it is up to them to retrieve it.
232		Shopping List	September 24, 2018	Zeus Cervas	SpongeBob and Sandy have to collect Krabby Patty ingredients, but Plankton follows their every step.
234		Patnocchio	August 8, 2018	Mr. Lawrence	Plankton tells Patrick he's his conscience so he can convince the wooden-headed star to steal him a Krabby Patty.
235		Plankton Paranoia	September 26, 2018	Luke Brookshier	Plankton hasn't tried to steal the secret formula in a while... and that's making Mr. Krabs nervous!
236		Call the Cops	September 27, 2018	Kaz	Plankton goes to jail, but the secret formula is taken as evidence, so SpongeBob and Mr. Krabs plot to get it back.
		Surf N' Turf	November 11, 2018		Sandy struggles to build a ship-in-a-bottle before a big contest, so SpongeBob calls in a little extra help.
238		Appointment TV	October 28, 2018	Andrew Goodman	The long-lost episode of Mermaid Man and Barnacle Boy is finally showing on TV, but SpongeBob may not make it home in time to watch it.
		Karen's Virus	November 4, 2018	Kaz	Karen gets a computer virus, and it's up to SpongeBob to get it out of her.
239		The Grill is Gone	October 21, 2018	Andrew Goodman	When a gang of kids steal the Krusty Krab's grill, SpongeBob and Mr. Krabs go to extreme lengths to win it back.
240		Girls' Night Out	November 4, 2018	Mr. Lawrence	Sandy invites Karen and Mrs. Puff out for a night on the town, so the ladies decide to blow off some steam.

Season 12

Appearances in this season: 17 (including his cameos in "Senior Discount" and "Dream Hoppers")

#	Titlecard	Title	Airdate	Written by	Description	Screenshot
242		Gary & Spot	July 27, 2019	Andrew Goodman	Sandy narrates the nightly adventures of Gary and his secret pal, Spot.
244		The Krusty Slammer	January 27, 2019	Andrew Goodman	Mr. Krabs turns the Krusty Krab into a jailhouse after Plankton breaks the law, but crime only pays for so long.
245		King Plankton	June 22, 2019	Kaz	Plankton practices ruling the world by shrinking himself down and declaring himself king of SpongeBob's aquarium.
246		Plankton's Old Chum	November 30, 2019		When Plankton's usual spot to dump his rotten chum is too full, he tricks SpongeBob into hiding it around the city.
248		The Krusty Bucket	August 10, 2019	Mr. Lawrence	Plankton creates a clone of himself and Mr. Krabs, but neither restaurant is safe from the newcomer.
250		Karen's Baby	August 10, 2019	Ben Gruber	Karen quickly learns that kids grow up too fast after her new child arrives in the mail.
251		Senior Discount	July 6, 2019	Andrew Goodman	Old Man Jenkins, as usual, interferes with work at the Krusty Krab, but Mr. Krabs cannot find a way to drive him out.
254 + 255		SpongeBob's Big Birthday Blowout	July 12, 2019	Kaz Mr. Lawrence	SpongeBob and Patrick tour the surface world, while the rest of Bikini Bottom prepare a surprise party for SpongeBob!
257		Handemonium	November 23, 2019	Mr. Lawrence	Plankton's giant Chum Bucket glove runs wild in town, but SpongeBob has a handy friend to help them out.
259		The Ghost of Plankton	October 12, 2019	Mr. Lawrence	Plankton becomes a ghost to steal the secret formula, but requires a few lessons from the Flying Dutchman.
		My Two Krabses	January 18, 2021	Andrew Goodman	Mr. Krabs gets ready for a hot date, but SpongeBob and Patrick give him a little more help than he needs.
261		Hiccup Plague	April 22, 2022	Luke Brookshier	No one in Bikini Bottom is safe from a case of contagious hiccups.
262		The Hankering	November 30, 2019	Andrew Goodman	Mr. Krabs has a secret taste of something... surprising.
263		Who R Zoo?	February 8, 2020	Mr. Lawrence	SpongeBob and Patrick create their own zoo made entirely of bubbles.
		Kwarantined Krab	April 29, 2022	Andrew Goodman	The Krusty Krab goes under emergency quarantine, but no one knows who carries the mysterious illness...
264		Plankton's Intern	April 30, 2021	Luke Brookshier	Plankton needs help to steal the secret formula, so he hires an intern who knows more about Mr. Krabs than anyone else.
267		Dream Hoppers	November 7, 2020	Andrew Goodman	SpongeBob explores the melodious dreamscapes of his sleeping neighbors.

Season 13

Appearances in this season: 16 (including his appearance as Jack Plankton in "Plankton and the Beanstalk"; Friendiversary does not count as he is only mentioned in that episode)

#	Titlecard	Title	Airdate	Written by	Description	Screenshot
268		A Place for Pets	October 22, 2020	Andrew Goodman	Customers bring pets into the Krusty Krab, and Mr. Krabs learns pets are more profitable than owners.
		Lockdown for Love		Mr. Lawrence	When Plankton ruins a date with Karen, she puts the Chum Bucket on lockdown until he can show affection.
271		Something Narwhal This Way Comes	November 19, 2021	Mr. Lawrence	Two familiar faces from SpongeBob's past visit Bikini Bottom, but they bring a big problem along with them.
		C.H.U.M.S		Ben Gruber	After falling down the drain, Plankton finds an unlikely ally in the sewers.
272		SpongeBob's Road to Christmas	December 10, 2021	Kaz	SpongeBob and Patrick travel to the North Pole to give Santa a present.
273		There Will Be Grease	April 29, 2022	Andrew Goodman	Mr. Krabs and Plankton must work together after discovering a well of miracle-grease under their restaurants.
274		Sea-Man Sponge Haters Club	May 6, 2022	Luke Brookshier	Squidward hosts a secret "We Hate SpongeBob Club" at his house.
276		Say Awww!	May 20, 2022	Andrew Goodman	Frustrated that he's seen as cute instead of evil, Plankton builds a robot to punish anyone who says "aww!".
277		Captain Pipsqueak	July 22, 2022	Richard Pursel	Plankton joins the League of E.V.I.L.
279		You're Going to Pay...Phone	January 13, 2023	Andrew Goodman	Mr. Krabs installs a cursed payphone in the Krusty Krab.
281		Karen for Spot	February 3, 2023	Danny Giovannini	Karen looks after Spot while Plankton goes out of town.
284		The Flower Plot	March 24, 2023	Mr. Lawrence	The Chum Bucket is replaced by a flower shop with a charming new owner.
		SpongeBob on Parade	March 31, 2023	Kaz	The Krusty Krab enters a float in the annual Bikini Bottom Parade.
285		Delivery to Monster Island	April 7, 2023	Andrew Goodman	SpongeBob and Plankton must work together to survive an island of deadly monsters.
288		Dopey Dick	June 29, 2023	Mr. Lawrence	Squidward joins a crew of sailors hunting down the great white jellyfish.
		Plankton and the Beanstalk	July 17, 2023		Plankton finds a magic bean that takes him to a land of giants.

Sheldon J. Plankton/Appearances

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