The contents of this article or section are considered to be non-canon and therefore may not have actually happened/existed.
Bartholomew JoJo Simpson, Jr. is Bart's imaginary son, whom Bart envisions in a future where he never passes the Fourth Grade.
In Bart's vision, he has been held back in the fourth grade for years. He has a wife and is in the same class as his son. An elderly Mrs. Krabappel asks middle-aged Bart Sr. for the name of the pirate in Treasure Island. When he can't come up with the name, Bart Jr. tells him it's Long John Silver. Mrs. Krabappel then punishes both of them by giving them detention.