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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 is wearing 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 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.
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 (V • E)|
BlackJack • Captain Blue SquarePants • Drifter • Ensign • Girly Teengirl • Grandma SquarePants • Grandpa SquarePants • Harold SquarePants • Margaret SquarePants • Moldy Sponge (character) • Old timey gentleman • Primitive Sponge • Sherm SquarePants • Snow sponge • SpongeBob's grandson • SpongeBob SquarePants • SpongeBoy • SpongeBuck SquarePants • SpongeGar • SpongeTron • Spongy Spongy • Stanley S. SquarePants • The Maniac • Todd SquarePants • SpongeBob's great grandmother • SpongeRobert