Karen Plankton is one of the two main antagonists (alongside Plankton) of SpongeBob SquarePants. She is a waterproof supercomputer who lives in the Chum Bucket laboratory. She is Plankton's wife and sidekick to steal the secret formula of the Krabby Patty. Karen's name is based on Hillenburg's wife Karen Hillenburg.
Karen first appeared in the episode "Plankton!" along with Plankton on July 31, 1999.
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| Television series | |
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| Characters | |
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| Production | |
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| Episodes | |
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| Movies | | Main series | |
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| Spin-offs |
- Saving Bikini Bottom: The Sandy Cheeks Movie (2024)
- Plankton: The Movie (2025)
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| Shorts | |
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| Albums |
- Original Theme Highlights
- The SpongeBob SquarePants Movie – Music from the Movie and More...
- The Best Day Ever
- SpongeBob's Greatest Hits
- It's a SpongeBob Christmas! Album
- Sponge Out of Water
- Sponge on the Run
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| Other media |
- Merchandise
- SpongeBob Comics
- Musical
- "I'm Ready"
- "Squidward Nose"
- "Agua"
- ai_sponge
- Behind Closed Doors
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| Attractions |
- Jimmy Neutron's Nicktoon Blast (cameo)
- Sandy's Blasting Bronco
- SpongeBob's Crazy Carnival Ride
- SpongeBob SquarePants 4-D
- Rock Bottom Plunge
- SpongeBob SquarePants 4D: The Great Jelly Rescue
- Universal's Superstar Parade
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| Miscellaneous |
- Square Roots: The Story of SpongeBob SquarePants
- 2015 SpongeBob SquarePants 400
- Awards and nominations
- Krusty Krab
- Krabby Patty
- Spongiforma squarepantsii
- Astrolirus patricki
- Clathria hillenburgi
- Super Bowl LIII halftime show
- SpongeBob SquarePants fan theories
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