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World 1 is the first world in the game. It is the Mushroom Kingdom, and Mario starts out by Princess Peach's castle. After defeating Bowser, Mario will advance to World 2.
NSMB WorldOne

View of World 1

LevelsEdit

  • World 1-1 (Mushroom Kingdom)
  • World 1-2 (Underground)
  • World 1-3 (Sky)
  • World 1-Tower (Boss: Bowser Jr.)
  • World 1-4 (Mushroom Kingdom)
  • World 1-5 (Sky)
  • World 1-Castle (Boss: Bowser)

Bonus LevelsEdit

  • World 1-A (Underwater)

TriviaEdit

Enemies IntroducedEdit