When we think of the Mushroom Kingdom’s most notorious villains, King Bowser often steals the spotlight ... As the heir to the Koopa throne, he’s not just the future of villainy—he’s ...

Usually acting as the second-strongest boss next to Bowser, Bowser Jr. is a longtime nemesis of Mario's and one of the Koopa ...

Additionally, certain games billing Mario do not feature Bowser as a villain at all. Here are some of Mario's best foes outside the Koopa King. Although not originally a Mario villain, this ...