World D

World D is the fifth and final secret world that was featured in the game Super Mario Bros.: The Lost Levels. Like the other secret worlds, it was left unused in Super Mario Bros. Deluxe. When Bowser is defeated at the end of World D-4, Princess Toadstool is saved, and, as such, Mario and Luigi beat the game.

Enemies

 * Hammer Bro
 * Green Paratroopa
 * Bill Blaster
 * Bullet Bill
 * Red Paratroopa
 * Green Koopa
 * Red Piranha Plant
 * Buzzy Beetle

Super Mario Bros.: The Lost Levels
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Super Mario All-Stars
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