SMM > Level FilesA Super Mario Maker level consists of the following files:
Offset Size Description
0x0 8 Assumed to be a version number or a way to the game to valitate the file. Always 0xB right now 0x8 4 CRC32 of file from offset 0x10 until the end 0xC 4 Padding 0x10 2 Last modification year 0x12 1 Last modification month 0x13 1 Last modification day 0x14 1 Last modification hour 0x15 1 Last modification minute 0x16 1 Unknown 0x17 1 Official course (for levels with downloaded status true)0x18 2 Unknown 0x1A 6 Last 12 digits of level ID (if it’s filled with zeros, other values like Official course or Mii data won’t show in game) 0x20 1 Is downloaded level (0 or 1) 0x21 1 Previously removed level from servers (0 or 1) 0x22 5 Unknown 0x27 1 Game version (physics)0x28 64 Level name (UTF-16) 0x68 2 Unknown 0x6A 2 Game style (M1, M3, MW or WU) 0x6C 1 Unknown 0x6D 1 Level theme 0x6E 1 Uploaded level to servers (0 or 1) 0x6F 1 Clear check level status (0 or 1) 0x70 2 Level timer 0x72 1 Level scroll (0 = None, 1 = Slow, 2 = Medium, 3 = Fast) 0x73 1 Unknown 0x74 4 Level length (minimum: 0x00000180, maximum: 0x00000F00 and increases/decreases by 0x10) 0x78 96 Space reserved for Mii data (for levels with downloaded status true) 0xD8 4 Signed integer value for Mii country flag (for levels with downloaded status true, see table here ) 0xDC 4 Unknown 0xE0 12 Padding 0xEC 4 Objects/items/enemies count 0x108 83176 Space reserved for objects/items/enemies 0x145F0 2400 Space reserved for sound effects 0x14F50 176 Padding
The following repositories provide more information about placing objects:
Value Maker
0x0 None 0x1 Mary O. 0x2 Yamamura 0x3 Mr. Eraser 0x4 Undodog 0x5 Bowser 0x6 Coursebot 0x7 Parakeet 0x8 Soundfrog 0x1D Event Course
This field specifies the game version of the physics engine. The older the version, the less patches have been applied.
Value Version
0 1.00 1 1.20 2 1.30 3 1.43 4 1.44 5 1.45 6 1.46 7 1.47
Value Theme
0 Ground 1 Underground 2 Castle 3 Airship 4 Underwater 5 Ghost house
Offset Size Description
0x0 4 Assumed to be a way to the game to valitate the file. Always 0x76, 0x24, 0x6A, 0xAE 0x4 55,300 Unknown, but always filled with zeros
Level thumbnails are saved with a .tnl extension. A .tnl file always has a size of 0xC800 bytes. It is a wrapper around the JPEG format. More details about the format can be found here .
thumbnail0.tnl contains an overview of the whole level. Its maximum resolution is 720 x 80 pixels (the width can be smaller).thumbnail1.tnl contains a picture of the initial screen. Its resolution is 320 x 240 pixels.