How to Reach World 4 and World 7 in New Super Mario Bros. (DS)

Unlocking Worlds in New Super Mario Bros. (DS)

You're likely playing New Super Mario Bros. (2006), not the arcade Mario Bros. The DS game has 8 worlds, unlocked sequentially.

Unlock Path

1. World 1 – Available from start.
2. Beat World 1 Castle → World 2
3. Beat World 2 Castle → World 3
4. Beat World 3 Castle → World 4
5. Beat World 4 Castle → World 5
6. Beat World 5 Castle → World 6
7. Beat World 6 Castle → World 7
8. Beat World 7 Castle → World 8

Key Details

• Each world ends with a Castle level (tower in Worlds 1, 3, 5, 7; castle in 2, 4, 6, 8).
• Defeat the boss (Bowser Jr. or Bowser) and touch the flagpole to unlock the next world.
• Secret exits (red flagpoles) unlock World 9 (Star World) and cannon shortcuts, but are not required for Worlds 4 or 7.

If You're Stuck

• Replay levels for power-ups (Blue Shell, Mega Mushroom).
• Watch a YouTube walkthrough for the specific castle boss pattern.
• Use the “Super Guide” (green block appears after 8 deaths in a level) to auto-complete.

Note: The original arcade Mario Bros. (1983) has no worlds—just sequential stages. The DS includes it as an unlockable mini-game (play 2-player VS mode).