PNEL is a file format that is used by Puzzle Swap of StreetPass Mii Plaza for loading additional puzzles to the 7 default ones. PNEL probably stands for Panel.

File Format

Header

Offset Size Description
0x00 0x04 Magic word "PNEL"
0x04 0x04 Magic word "0800". Probably last 4 digits of the japanese title ID.
0x08 0x04 Number of puzzles
0x0C 0x04 Unknown. Always 0x00000001
0x10 0x04 Unknown. Probably some CRC-32

After the header the first additional puzzle begins.

Puzzle Entry

Offset Size Description
0x00 0x04 Order number. First puzzle is a 7 because 0-6 are the preinstalled puzzles
0x04 0x04 Unknown. Probably some CRC-32
0x08 0x04 Absolut offset of start of puzzle image
0x0C 0x04 Absolut offset of start of puzzle settings
0x10 0x04 Absolut offset of start of puzzle model/figure
0x14 0x04 Size of puzzle image
0x18 0x04 Size of puzzle settings
0x1C 0x04 Size of puzzle model/figure
0x20 0x04 CRC-32 over data of the puzzle image
0x24 0x04 CRC-32 over data of the puzzle settings
0x28 0x04 CRC-32 over data of the puzzle model/figure
0x2C 0xC00 Name of the puzzle in different languages
0xC2C 0x01 ID of number of puzzle pieces: 0 => 15 pieces; 1 => 24 pieces; 2 => 40 pieces
0xC2D 0x01 Pink puzzle pieces
0xC2E 0x02 Unknown or Padding

The data of the image, settings and model/figure are always padded with 0x00 until the offset is divisible by 4 (4 byte alignment). These padding bytes are not part of the CRC-32 calculation