Well, thanks to the new (currently in work but should be out soon) version of my editor which has the changeable sprite sets, I now have the lost levels fully playable and working!

No videos this time because I'm lazy, but now you get to try them out.

These are all the original levels. The only changes I've made are the sprite sets and the end of the levels (for 4 and 5).
To play them, simply download my editor (any version will work) and import the level file on top of an existing level.

Level 1
This was originally a Mario vs. Luigi grassland level - it contains the star objects, but they're not activated in my version.

It includes the moving mushrooms from NSMB beta which all moved really fast (unlike the ones in the final game). Note that they're all mispositioned due to changes in the game engine. (In beta NSMB, the sprite locations were the actual base of the mushroom. In the final NSMB, they're located based off the top left.)

There are also a few objects which are no longer in the game. (You'll see them as messed up slopes and X's.) I figured out that they were most likely mushrooms.
Object 35 seems to have been a small mushroom stalk. Object 36 was a big mushroom stalk. Objects 21, 20 and 19 (in that order) were the left, middle and right bits of a mushroom respectively (no idea what colour); object 18 was a version which expanded by itself and didn't need to have the sides placed manually.

Download: http://treeki.shacknet.nu/nsmbunused1.nml

Level 2
Another Mario vs. Luigi level. This one is based in a castle - it contains some pillars which never showed up in the final game (They're blank in the editor, because they work like the pipes - they're 2D graphics rendered in 3D for some reason), a giant springboard (also unused, but works perfectly) and unused 2D lava. It also contains a Whomp but that's not really a new find; the main game uses it.

One notable thing about it is that not all the sprites work correctly - due to more changes in the game engine, the flip fences (bottom-left of the level) and Mario Bros platforms (right side of the level) don't both work at the same time. I chose to enable the platforms.

Download: http://treeki.shacknet.nu/nsmbunused2.nml

Level 3
Yet another Mario vs. Luigi level. This one has another minor sprite conflict: there's a seesaw platform (like in 1-2) which won't work at the same time as the moving mushrooms (which this level also uses).

It has a few interesting bits - the level is split up into two areas which are connected at several points by doors. There's also a bonus area which uses objects from the tileset 2. (It's obvious tileset 2 was completely redone - none of the objects are valid any more.)

After reaching a specific spot in the level, the game will have a major crash - everything will freeze up and the background will go crazy. (I'm not exactly sure what causes it, but I suspect the Chain Chomp with sprite data of "00 00 02 00 00 00" near the crash area is at fault - the value 02 is never used in the game, only 00 and 01.)

Download: http://treeki.shacknet.nu/nsmbunused3.nml

Level 4
This is an average-sized desert level. It contains nothing notable other than the lack of a midway point and an insane amount of blocks containing mushrooms. (Yes, just mushrooms - no fire flowers.) There are also a lot of powerups. The start of the level has two powerup blocks on the same screen.

I had to redo the end of this level for it to be completable, so it doesn't match the beta NSMB exactly, but it's as close as I can get. I simply changed the flagpole to the final version, and added a castle.

Download: http://treeki.shacknet.nu/nsmbunused4.nml

Level 5
An EXTREMELY long desert level split into two areas. It also has no midway point. It also has a lot of powerups.

This level might be familiar to you - back at one E3 (I forgot which), it was available as a playable demo. There's a video somewhere, but I couldn't find it.

As with level 4, I had to fix the flagpole and castle. Everything else is just as I found it.

Download: http://treeki.shacknet.nu/nsmbunused5.nml


Have fun with these. If you have any problems, feel free to post here about it. I wish there were more unused levels to discover.

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