SpongeBob SquarePants

Grandma Plankton

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Grandma Plankton
Plankton's Grandmother
Physical Appearance
Gender: Female
Color: Green
Species: Plankton
Spouse: Grandpa Plankton (Late Husband)
Children: Mr. Plankton (Son)
Grandchildren: Sheldon J. Plankton (Grandson)
Plankton's Cousins
Other relatives: Mrs. Plankton (Daughter-Law)
Series Information
First appearance: Krabs vs. Plankton (mentioned)

Gramma's Secret Recipe (live appearance)

Latest appearance: Gramma's Secret Recipe
Portrayer: Laraine Newman
List of characters

Grandma Plankton is Plankton's paternal grandmother and Plankton's father's mother. She was first mentioned in the episode Krabs vs. Plankton. She was called Gram-Gram in that episode. Her only physical appearance was in Gramma's Secret Recipe. She is voiced by Laraine Newman.


She looks similar to Plankton, except that she has glasses, dentures, puffy hair, and wears an orange dress that has green polka dots


She lives in Shady Shoal's Retirement Home along with many other elderly citizens, including Mermaid Man, and Barnacle Boy. Plankton dressed up as her in another attempt to steal the Krabby Patty Secret Formula. Plankton borrowed his grandmother's glasses, her dentures, her dress, and her puffy hair to be SpongeBob's maternal grandmother.

Characters (VTE)


SpongeBobPatrickSandySquidwardMr. KrabsPlanktonGary


Mrs. PuffPearlKarenMermaid ManBarnacle BoyLarry the LobsterSquilliam FancysonJohnny ErainFlying DutchmanPatchy the PiratePotty the ParrotKing NeptunePainty the Pirate

Major Background

Bubble BassFredHaroldNat PetersonOld Man JenkinsSandalsTomSadie Rechid



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