Ends 12/22/2010 12:00 AM

Super RMN Bros. 2 is a community event where everybody makes 2D Mario platformer levels which then all get put into one game: Super RMN Bros. 2! The tool used for this is Super Mario Bros. X v1.3, a PC Engine made to emulate the Mario games made on the NES and SNES. This event is a followup of the previous Super RMN Bros. event, which was a great success (submission-wise, at least)! Whip out those old Mario level drawing you made when you were eight! Live the dream of making your own Mario game! Show once again that RMNers can do more than just make RPGS!

What You Need to Participate

Super Mario Bros. X v1.3, available at the DONWLOAD NOW! link. This is the latest version of SMBX with new features like Ice Flowers and different playable characters. Make sure you download the correct version, the file size should be ~37.6MB. It has everything you need to get started from the player, the editor, and a sample world.

You can also download the SMBX Graphics Pack by Red Yoshi at the bottom of the page. It has a ton of Mario Brothers graphics that you can use in your level with a simple copy+paste!

Just What is Super Mario Brothers X?

Super Mario Bros X is a freeware game engine by Redigit geared towards having the gameplay features and physics of Mario 3 and Super Mario World while adding a ton of cool features and not having to deal with the restrictions of the old (S)NES hardware. Since we first had RMN Bros using 1.2 Beta 4 SMBX has move onto version 1.3 adding new content such as some of the Koopalings, new features such as being able to customize NPCs, and general fixes such as reducing lag in the engine. If you really want to see what SMBX can do, check out these videos showcasing SMBX's capabilities!

Games are distributed as a world with levels package they can add to Super Mario Bros X and play from the main game. So far there's no way to make a self contained game so all players will need to download SMBX in order to even play the game. The game does come with a large set of graphics and sounds like the RPG Maker RTPs so everybody at least has a large number of platformer resources to work with (and it'll keep the download of the actual game itself small).

You can view the RMN engine page for SMBX here.


The editor can be tricky to use, especially for beginners. You can ask questions on our SMBX Help thread on our forums! If you have any questions go there for some tips or helpful links.

We also have a tutorials section on RMN for SMBX. As of now it's pretty empty but hopefully members will submit more over time.

There's also the official SMBX forums filled with much more knowledgable people than here.

Submission Rules

  • Levels must be compatible with the official release of SMBX 1.3 . aka Use SMBX 1.3 .
  • All submissions must be compressed. Downloading *.lvl files is twice the headache than a *.zip or *.rar file. I'm not even going to bother with anything that isn't compressed.
  • Each individual submission can't exceed 1MB compressed. You can fill it up with all the custom music or graphics you want but a submission can't exceed this size.
  • There is no limit to the number of levels you can submit.
  • Rate the difficulty of the level on a scale of 1 to 5, with 1 being easy and 5 being hard.

Level Rules

  • The end of level marker is always a star. Each level can only have one star in it. Stars give a progress indicator throughout the game and for individual levels and since all levels will be available at the start of the game Stars are the best way for players to know what levels they've already done.
  • The player who got the star can't die after getting the star.
  • Water and waterfalls are swimmable as per Mario Bros 3. (No Mario 2 and it's waterfalls don't count). If you want lethal liquids stick with red lava. This is for clarity for players. Blue = Swimmable, Red = Danger!
  • You can't finish a level with a Yoshi. This is to prevent players from bringing Yoshis from one level to another and they drastically redefine what a player can do. You can force this by having a pipe/door/warp of some sort that doesn't allow Yoshis prior to any exit.
  • The player can't enter a no-win situation. At any point where the player is safe they must be able to complete the level.
  • Multiple characters are allowed. (SMBX v1.3 allows the player to play as Mario, Luigi, Toad, Peach or Link.)
  • Collectathons are not allowed. SMBX has no way of tracking what items you've collected and Mario takes too much damage to allow such a level.

Level Quality

  • Levels that don't meet a minimum level of quality will be rejected.
  • Levels must be complete and stars must be possible to acquire.
  • If you are creating an autoscrolling level please check the Autoscrolling Tutorial for a guide of how to do it. Using scrolling layers leads to physics and collision issues and levels with these issues will be rejected.
  • If a level plays like something you'd expect from a Kaizo-style romhack it will be rejected. Go start your own project if you want yet another impossible Mario game. We're shooting for fun platforming action Mario style that doesn't require precognition, time manipulation, or godlike reaction to beat.
  • Levels can't cause SMBX to reach a volatile or glitchy state nor can they cause level/section wide slowdown in SMBX.
  • Participants who submitted rejected levels will be notified of such, the cause of rejection, and a period to correct issues.


  • All levels will be available at the start of the game. There is no requirement to complete one level to unlock others.
  • Yes it will be a world map. (No hub world!)
  • Eight worlds, one Mario! (or Luigi, or Toad, or Peach, or Link!)


You must be logged in to sign up for Super RMN Bros. 2.


Having a signature is too mainstream. I'm not part of your system!
You just made my day.
Circumstance penalty for being the bard.

It would appear we have competition this time...
Is there a maximum to the levels we can submit?
Circumstance penalty for being the bard.
Some other thoughts:

-When you place a star at the end of a level, make sure that Mario will not die after grabbing the star. This happened a few times in RMN Bros.

-Place enemies where they are thematically appropriate. Thwomps don't go in sky worlds, ghosts go in fortresses/ghost houses, etc.

-Don't use obtuse/obscure mechanics to clear levels. If you need to kill a specific enemy to make something happen, make sure the player can reasonably infer this.

-Make sure your level looks like something you might actually see when playing a Mario game.

-Keep your language PG. This is Mario, people. The fact that I need to remind people of this is regrettable.
Because I spent far too long on it, have the full quality version of the Mario vs The Moon Base video!

Desmo: No limit, you can submit as many levels as you want! Just submit them before the end date.
I'll try to at least get something done.
who am i and how did i get in here
Im in!!! Woo!

I cant read this text...
Dang nabbit, I forgot the CSS needs a fix for IE8. I'll make a fix and nag Anylo to update the CSS tomorrow.
Having a signature is too mainstream. I'm not part of your system!
@Solitayre: I'll put my thwomps where I damn well please. I agree with other points though.
Circumstance penalty for being the bard.
First entry.

Crystal Forest
Difficulty: 2

Submission entry is broken so I can't officially submit it yet.
Circumstance penalty for being the bard.
You can make a level require you to be Link, I think. I am not opposed to a Link-themed world.
I think a Link-themed world would be neat although I'm not quite as keen on having to play as Link for an entire world. I won't be ruling against such levels but I like the idea of Mario being a fish out of water: Jumping in Hyrule in a place made for stabbing and cutting
Yeah, I can see how some people might not like it. We can just put no restriction on characters.

*also, is the world map only going to be made after the submission cut-off date?
RMN's Official Reviewmonger
I just gotta do something for this. I regretted missing the first, so I shan't again!
Guardian of the Description Thread
I knew this would happen, and am very much tempted to join in the fun. However, I think I want to spend a bit of time getting used to the maker before I make any promises/sign up.