World B-4

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Not to be confused with Level B-4.
World B-4
World B-4
Level code World B-4
World World B
Game Super Mario Bros.: The Lost Levels
Time limit 300 seconds
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World B-4 is the fourth and final level of World B in Super Mario Bros.: The Lost Levels and the twelfth secret level overall in said game, taking place in a castle.


The player starts at the top of some stairs that end at a pit of lava with small platforms and pillars. After a pipe with a Piranha Plant, there are two Fire Bars over a pit of lava and a Brick Block with a power-up in a crevice to the left. In the upcoming narrow passage, the player will have to fall onto a moving lift to pass under a wall (while crouching if needed) and jumping back up once on the other side to continue. Next, the player will have to move through an area with large platforms, with Fire Bars and pipes with Piranha Plants alternating between them. The first three are Warp Pipes that lead back to the beginning of the level, though the fourth is a Warp Pipe that leads to a Warp Zone to World D. After the fourth pipe is lava with a Fire Bar over it before the Fake Bowser.


Name Count
A Red Piranha Plant from Super Mario Bros.: The Lost Levels
Piranha Plant
SMB Bowser Breathing Fire Sprite.gif
Fake Bowser (Green Koopa Troopa (FDS) / Green Cheep-cheep (SNES))

Level statistics[edit]

Feature Count Notes
Super Mushroom sprite from Super Mario Bros.: The Lost Levels.
Magic Mushroom
1 Replaced by Fire Flowers if Mario is already Super Mario.
Fire Flower
Fire Flower
1 Replaces Magic Mushrooms if Mario is Super Mario.
Secret Area 1 Entrance to the secret area is in the fifth pipe. Contains the Warp Zone to World D.

Level maps[edit]