: Bowser's seven children—Larry, Morton Jr., Wendy O., Iggy, Roy, Lemmy, and Ludwig von Koopa—each acting as a boss at the end of a world.
In the world of , peace in the Mushroom Kingdom is shattered when Bowser returns with his seven children, the Koopalings . These troublemakers invade the seven kingdoms of the Mushroom World, stealing each king's magical wand and transforming the rulers into animals. Princess Toadstool dispatches Mario and Luigi to travel across these diverse lands—from the giant-sized objects of Giant Land to the freezing paths of Iced Land—to retrieve the wands and restore the kings.
As the brothers successfully liberate the kingdoms, they discover Bowser has used the distraction to kidnap Princess Toadstool herself. Their journey culminates in a perilous trek through , Bowser’s own realm, where they eventually face the King of Koopas in his castle to rescue the Princess and bring lasting peace back to the world. A Theatrical Twist Super Mario Bros. 3
Interestingly, the entire game was conceived by as a stage play . This creative choice is reflected in several in-game details:
: Background objects like platforms and bushes often cast shadows on the "skyline" or appear bolted to the backdrop. : Bowser's seven children—Larry, Morton Jr
: The iconic Super Leaf allows Mario to grow a raccoon tail and fly, while other suits like the Frog Suit and Tanooki Suit provide unique environmental advantages.
Beyond the game, this story was adapted into a popular animated series, , produced by DIC Entertainment , which further explored the antics of the Koopalings in both the Mushroom Kingdom and "The Real World". Princess Toadstool dispatches Mario and Luigi to travel
: The game begins with a stage curtain being drawn open.