In Mr. Plankton Universe,"SpongeBob" SquarePants is presumably born the same day as his mainstream counterpart was. He was also a presumed high school graduate.
Biography
He started working for his universe's Plankton flipping Krabby Patties like his mainstream counterpart did for the mainstream Mr. Krabs. He also helped defend the Krusty Krabs from the Krabs that lives to destroys Mr. Plankton's restaurant. One day, the mainstream Plankton traveled to this SpongeBob's universe. SpongeBob confused that Plankton for his Plankton. After Plankton wanted two Krabby Patties, SpongeBob told him they were for the customer and gave him two other patties. Just a little bit later, SpongeBob asked for his weekly report review. Plankton, inexperienced, gave promoted SpongeBob to co-cashier. After SpongeBob gave a customer the wrong size drink he kept saying that he soiled the Krusty Krab's good name. After Krabs invaded the Krusty Krab, SpongeBob shot clothes at him and successfully got him in a bra. SpongeBob led the victory screech, and since Plankton went back to the main reality, this SpongeBob has not been seen again.