Sheldon J. Plankton

Sheldon J. Plankton, more commonly known as Plankton, is the main antagonist of the SpongeBob SquarePants franchise. He is a planktonic copepod and arch-competitor of Mr. Krabs. He runs a massively unsuccessful restaurant called the Chum Bucket alongside Karen, a waterproof computer who is his sidekick and wife. The Chum Bucket is highly unpopular in Bikini Bottom because it serves chum, a type of bait made from fish meat.

## Appearances

Spongebob Squarepants:

* Plankton!
* Culture Shock
* F.U.N
* Sleepy Time
* Valentine's Day (Non-speaking cameo)
* Walking Small
* Imitation Krabs
* Life of Crime (Mentioned)
* Christmas Who? (Cameo)
* Welcome to the Chum Bucket
* Band Geeks
* The Fry Cook Games
* The Algae's Always Greener
* Mermaid Man and Barnacle Boy IV (Cameo)
* Snowball Effect (Cameo)
* Krusty Krab Training Video
* Party Pooper Pants
* Plankton's Army
* The Sponge Who Could Fly
* Spongebob Meets the Strangler (Cameo)
* Fear of a Krabby Patty
* Krabs vs. Plankton
* Enemy-In-Law
* Mermaid Man & Barnacle Boy VI: The Motion Picture
* Patrick SmartPants (Cameo)
* Wishing You Well
* New Leaf
* Best Frenemies
* Friend or Foe
* Spy Buddies
* Krabs a la Mode
* Bucket Sweet Bucket
* Goo Goo Gas
* Atlantis Squarepantis
* Mermaid Man vs. Spongebob
* 20,000 Patties Under the Sea
* Banned in Bikini Bottom
* Stanley S. SquarePants (Cameo)
* Krabby Road
* Spongicus
* Patty Caper
* Plankton's Regular
* The Krabby Kronicle
* Komputer Overload
* Chum Bucket Supreme
* Single Cell Anniversary
* Truth or Square
* Chum Caverns
* Tentacle-Vision
* Someone's in the Kitchen with Sandy
* The Inside Job
* Greasy Buffoons
* Spongebob's Last Stand
* One Coarse Meal
* The Play's the Thing (Non-speaking cameo)
* Rodeo Daze
* Gramma's Secret Recipe
* Welcome to the Bikini Bottom Triangle
* The Main Drain
* The Great Patty Caper
* That Sinking Feeling (Cameo)
* Buried in Time
* Shellback Shenanigans
* Perfect Chemistry
* The Other Patty
* Drive Thru
* Frozen Face-Off
* Squidward's School for Grown-Ups (Cameo)
* Sweet and Sour Squid
* A SquarePants Family Vacation (Cameo)
* Walking the Plankton
* Plankton's Good Eye
* The Krabby Patty That Ate Bikini Bottom
* Fiasco!
* Free Samples
* Karen 2.0
* For Here or to Go
* It's a Spongebob Christmas
* Super Evil Aquatic Villain Team Up is Go!
* Chum Fricassee
* The Good Krabby Name (Cameo)
* Move It or Lose It
* Hello Bikini Bottom (Cameo)
* Squirrel Record
* Eek, an Urchin!
* Jailbreak
* Evil Spatula
* It Came from Goo Lagoon
* Plankton's Pet
* Company Panic
* Married to Money
* CopyBob DittoPants
* Lame and Fortune
* Goodbye, Krabby Patty?
* Pineapple Invasion
* Salsa Imbecilius
* Mutiny on the Krabs (Cameo)
* Mimic Madness
* House Warming
* Plankton Gets the Boot
* Burst the Bubble
* Plankton Retires
* The Incredible Shrinking Sponge
* Feral Friends (Deleted scene)
* Spot Returns
* Spin the Bottle
* The Legend of Boo-ikini
* No Pictures Please
* Krabby Patty Creature Feature
* Teacher's Pests
* Fun-Sized Friends (Mentioned)
* Grandmum's the Word
* Bottle Burglars
* Shopping List
* Patnocchio
* Plankton Paranoia
* Call the Cops
* Surf N' Turft
* Appointment TV
* Karen's Virus
* The Grill is Gone
* Girls' Night Out
* Gary & Spot
* The Krusty Slammer
* King Plankton
* Plankton's Old Chum
* The Krusty Bucket
* Sandy's Nutty Nieces (Likeness only)
* Karen's Baby
* Senior Discount
* Spongebob's Big Birthday Blowout
* Handemomium
* The Ghost of Plankton
* My Two Krabses
* Hiccup Plague (TBA)
* The Hankering
* Who R Zoo?
* Plankton's Intern (TBA)
* Plankton's Holiday Hits
* Can't Swim
* Remolding
* Loop dee Loop
* Plankton Plays
* Beware Flying Jellyfish
* Spongebob's Legendary Dance Party
* Plankton's Color Nullifier
* The Spongebob Squarepants Movie
* The Spongebob Movie: Sponge out of Water
* The Spongebob Movie: Sponge on the Run (TBA)
* Spongebob's Squarepants 4-D: Ride
* Spongebob's Squarepants 4-D: The Great Jelly Rescue!
* SuperSponge Videogame
* Battle for Bikini Bottom Videogame
* The Spongebob Squarepants Movie Videogame
* Lights, Camera, Pants! Videogame
* Nicktoons Unite! Videogame
* Creature from the Krusty Krab Videgame
* Spongebob Squarepants featuring Nicktoons: Globs of Doom Videogame
* Nicktoons Racing Videogame
* The Yellow Avenger Videogame
* Spongebob's Boating Bash Videogame
* Plankton's Robotic Revenge Videogame
* Spongebob Heropants Videogame

## Sheldon J. Plankton

### Aliases

Plankton (Last name)Creepy bacteria (by Sandy)

Shelly (by Mr. Krabs)

Sandy Cheeks (as disguise)

Robot Krabs (as imitation)

Spongebob's great grandmother (as disguise)

Gary (as disguise)

Robot game show host (as disguise)

Cashina (as disguise)

### Relatives

Karen Plankton (Wife)Chip Plankton II (Son)

PlanKrab (Combo clone)

Gordon Plankton (Father)

Mama Plankton (Mother)

Lily Plankton (Paternal grandmother)

Grand Dad Plankton (Paternal grandfather)

Seymour (Paternal great-grandfather)

Basia (Paternal great-grandmother)

Clem (Cousin)

Marvin (Cousin)

Many other cousins

Planktonamor (Ancestor)

Dead Eye Plankton (Ancestor)

Fredrick (Father-in-law)

E.M.I.L.P (Mother-in-law)

Chip I (Grandfather-in-law)

Betty Krabs (Girlfriend; formerly)

Spot (Pet)

Labrador retriever (Pet)

### Affiliation

Chum BucketPlanktopolis (Formerly)

Mega Bucket (Uncompleted project)

Chumporium (Temporary project)

Chum Coliseum (Temporary project)

Chum Caverns (Temporary project)

The Patty Stealers

Therapist ("Fear of a Krabby Patty")

Salesman ("Shellback Shenanigans")

Girl Scout ("Pineapple Invasion")