Editing Super Mario World

|align="center"|[[Torpedo Base]]

The bosses of the game are comprised of Bowser's seven children, the [[Koopalings]], all who guard a castle at the end of every world, and [[Reznor]]s, the guardians of the fortresses. The Koopalings share the same boss patterns with another Koopaling pair, with the exception of Ludwig, though the later-encountered Koopaling of the shared boss fight has a more difficult variant of the fight. Reznor boss fights are all the same, regardless of which fortress is played on. Once the Koopalings are beaten, a small cutscene plays, where Mario rescues a trapped Yoshi inside an egg and destroys the Koopalings' fortifications through various means, unique for each Koopaling. For example, Iggy's Castle crumbles in a typical fashion when Mario hits a TNT switch; Ludwig's Castle rockets off and crashes into a nearby hill, causing a bandage to appear where it impacted; and Roy's Castle causes an accidental explosion to Mario instead. The levels cannot be normally played again once cleared, though in international versions, they can be replayed if the player holds {{button|snes|L}} and {{button|snes|R}} on the castle's remains. Bowser, the primary antagonist of the game, can be fought at both the [[Front Door]] and [[Back Door]], though the Back Door is a far shorter level that provides almost direct access to the boss.