Plankton's Grandmother 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 physical only appearance was in Gramma's Secret Recipe. She is voiced by Laraine Newman.
She looks like Plankton, except that she has glasses, dentures, a dress, and puffy hair.
She lives in Shady Shoal's Rest Home along with many other elderly citizens. Plankton dressed up as her in another attempt to steal the Krabby Patty Secret Formula. She probably thinks that Plankton is a girl, because she said that he was her favorite granddaughter. Plankton borrowed his grandmother's glasses, her dentures, her dress, and her puffy hair to be SpongeBob's maternal grandmother. She called SpongeBob a "rapscallion" for blocking the center who she thinks his grandma caught Plankton, for some reason.
|Characters (V • E)|
Patchy • Potty • French Narrator • Mermaid Man • Barnacle Boy • Flying Dutchman • King Neptune • Larry the Lobster • Harold SquarePants • Margaret SquarePants • Grandma SquarePants • Realistic Fish Head • Perch Perkins • Bikini Bottomites • Jellyfish