N. Unofficial name

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SpongeBob's great grandmother (possibly Great Grandma SquarePants or Great Grandma BubbleBottom), referred to as "great-grammyma," is one of four possible great grandmothers of SpongeBob SquarePants.


Although she has never made a physical appearance in the show as of yet, Plankton pretends to be her in the episode "Gramma's Secret Recipe." For his disguise, he wears a yellow and red long dress, with clear glasses and white, poofy hair.


Plankton portrays her in "Gramma's Secret Recipe" in an attempt of stealing the Krabby Patty secret formula.

He walks over to SpongeBob's house and fools him into thinking that he is his great-grandmother.

Towards the end of the episode, Plankton's real grandma realizes and enters the Krusty Krab, where she drags out Plankton, disguising as her. SpongeBob notices her and thinks that his great grandmother caught Plankton stealing the formula.


She may have been born to SpongeBob's great great grandmother.

At some point, she and her husband had Grandpa SquarePants, Grandpa BubbleBottom, Grandma SquarePants, or Grandma BubbleBottom.

She likely died during SpongeBob's young childhood because in "Gramma's Secret Recipe," he tells Plankton, who is pretending to be her, while tearing up, "I'm so glad you came back..."


Sponges (VE)

BlackJackCaptain Blue SquarePantsDrifterEnsignGirly TeengirlGrandma SquarePantsGrandpa SquarePantsHarold SquarePantsMargaret SquarePantsMoldy SpongeOld timey gentlemanPrimitive SpongeSherm SquarePantsSnow spongeSpongeBob's grandsonSpongeBob SquarePantsSpongeBoySpongeBuck SquarePantsSpongeGarSpongeTronSpongy SpongyStanley S. SquarePantsThe ManiacTodd SquarePantsSpongeBob's great grandmotherSpongeRobertSponge the Horse