In the latest issue of Game Informer, the magazine’s staff had the opportunity to ask Shigeru Miyamoto candid questions about the Super Mario Bros. series. One such question asked was regarding the relationship between the Koopalings and Bowser. They asked; “In Super Mario Bros. 3, the Koopalings were suppose to be Bowser’s children. But there’s also Bowser Jr. Are they all his kids, and are they all from different mothers? Is Bowser Jr. a Koopaling?”
Miyamoto’s response: “Our current story is that the seven Koopalings are not Bowser’s children. Bower’s only child is Bowser Jr. and we don’t know who the the mother is.”
First person to make an animated gif of Bowser dancing on The Maury Povich Show gets my eternal thanks.