List of alter-egos/Sheldon J. Plankton
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This is a list of every alter-ego of Sheldon J. Plankton.
| Image | Alter-ego name | Description | Appearance |
|---|---|---|---|
| File:Culture Shock 131.png | The Amazing Plankton | Plankton attends the talent show to steal a krabby patty from an audience member. Krabs sees through his trick, and when he tries to escape, he blows himself up. | "Culture Shock" |
| File:Mr.PlanktonUniverse.jpg | Mr. Plankton | Tired of being beaten by Krabs and desperate for a change, Plankton uses one of his inventions to switch lives, and finds himself wearing the same clothes that Krabs wears in an alternate world where he owns the Krusty Krab. | "The Algae's Always Greener" |
| File:The SpongeBob SquarePants Movie 191.png | Clay | TBA | The SpongeBob SquarePants Movie |
| File:Fear of a Krabby Patty 129.png | Dr. Peter Lankton | In an effort to get SpongeBob to tell him the secret formula, Plankton tricks Krabs into opening the Krusty Krab for 24 hours to wear the fry cook down mentally, and uses a psychiatrist disguise to take advantage, only for him to accidentally help SpongeBob by giving him some sleep via hypnosis. | "Fear of a Krabby Patty" |
| File:Mermaid Man & Barnacle Boy VI The Motion Picture 108.png | Man Ray | Plankton attends SpongeBob's filming of the Mermaid Man and Barnacle Boy movie wearing a mask similar to Man Ray's head, with the exception of the one eye hole. SpongeBob turns him down by saying Man Ray's not even part of the film but allows him to operate the boom mike. | "Mermaid Man & Barnacle Boy VI: The Motion Picture" and "Appointment TV" |
| File:Mermaid Man vs. SpongeBob 047.png | Professor Plankton | After seeing how Mermaid Man and Barnacle Boy's sponsorship with the Krusty Krab, he approaches the elderly superheroes as a salesman and uses a mind control shampoo to make them his minions. | "Mermaid Man vs. SpongeBob" |
| File:The Inside Job 172.png | Plankton SquarePants | After realizing the Krabby Patty formula is in SpongeBob's heart, he attaches the mind connector to it and slowly becomes a miniature version of SpongeBob. | "The Inside Job" |
| File:The Inside Job 199.png | Plankton Star | When Karen attempts to send Plankton back to the Chum Bucket, he attaches to Patrick's head and he turns into a mini version of Patrick, completely forgetting the formula. | "The Inside Job" |
| File:Gramma's Secret Recipe 128.png | Great-grammyma | TBA | "Gramma's Secret Recipe" |
| File:Shellback Shenanigans 087.png | Professor Plankton | Sheldon R. Shellcleaner | "Shellback Shenanigans" |
| File:Shellback Shenanigans 094.png | Gary the Snail | TBA | "Shellback Shenanigans" and'The SpongeBob Movie: Sponge Out of Water |
| File:Eek, an Urchin! 138.png | Planktonella | TBA | "Eek, an Urchin!" |
| File:Plank-Ton.png | Plank-Ton | TBA | The SpongeBob Movie: Sponge Out of Water |
| File:Cashina model pose.jpg | Cashina | Upon telling Mr. Krabs to marry money since he loves it so much, he creates Cashina and tries to make himself Krabs' wife to get the secret formula, but the robot explodes after one of Krabs' tears lands on the controls. | "Married to Money" |
| File:Spin the Bottle 061.png | Genie the Grant Wisher | Plankton comes up with the idea to pose as a genie and break the bottle he was in so Krabs would put him in the secret formula bottle, but he ends up with SpongeBob and is forced to keep up the facade until he suffers too much pain from being spun and whacked around. | "Spin the Bottle" and "Bottle Burglars" |
| File:Grandmum's The Word 012.png | Ray Ray | TBA | "Grandmum's the Word," "Lockdown for Love", "Single-Celled Defense" and "Tango Tangle" |
| File:Patnocchio 042.png | Patrick's conscience | TBA | "Patnocchio" |
| File:King Plankton?.png | King Plankton | TBA | "King Plankton" and "Kitchen Sponge" |
| File:The Ghost of Plankton 027.png | The Ghost of Plankton | TBA | "The Ghost of Plankton" |
| File:Captain Pipsqueak 100.png | Captain Pipsqueak | TBA | "Captain Pipsqueak" |
| File:Petunia.png | Petunia | As part of his Faux Florist plan, he pilots Petunia, becoming chummy with all of Bikini Bottom. He falls in love with the lifestyle and decides to put the plan on hold, until Karen reminds him of it and he quickly tries to dispose of the bombs he gave Krabs, only for Squidward to distract him too long and the explosives destroy the robot. | "The Flower Plot" |
| Pickle Dartfish | When Plankton's brain is fried by the Star family stepping on him, the Dartfish family adopt him, renaming him Pickle. Plankton protests against their small portions of food, and corrupts them with his evil habits. Eventually, Karen finds him and rejogs his memory. Plankton soon leaves the Dartfish family. | "Partial Recall" |
