Bowser's kids, called the Koopalings, were bosses in "Super Mario Bros. 3", "Super Mario World", "New Super Mario Bros. Wii", "New Super Mario Bros. 2", and "New Super Mario Bros. U". However, after "Super Mario World," The Koopalings were no longer Bowser's biological kids, since they are now adopted children and Bowser Jr. is now his biological child. In "Super Mario World", Bowser appears in a clown car and throws Mecha Koopas.