Sheldon J. Plankton is a figure in the SpongeBob SquarePants theme, first released in 2006. Because of the character's extremely small size, his LEGO version is a single cylinder brick.


Most versions of Plankton are a single sand green piece, Part 3062bpx1, printed with the character's signature unibrow, eye and diabolical grin. The larger-scale 3826 Build-A-Bob set features a bigger, multi-brick Plankton that uses a sticker rather than pre-printed parts.


Plankton is a traditional evil genius and master inventor, locked in an eternal struggle with his arch-rival, Mr. Krabs, for control of the hearts and minds of Bikini Bottom's discerning fast-food lovers. Unfortunately, the signature Chum on a Stick he serves in his restaurant, the Chum Bucket, can't compare to Mr. Krabs' Krabby Patties, made to a secret recipe by his fry cook, Spongebob SquarePants. As a result, he spends most of his time, effort and incredible technology trying to discover the secret recipe so that he can drive Mr. Krabs out of business before going on to rule the world. He operates a failing restaurant called "Chum Bucket" with his sardonic computer wife, Karen Plankton.



  • He is one of the few minifigures consisting of just one brick.

Gallery of Variants

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