Save file structure for Gen 3 and an unknown 4-byte value

[yschectman]

Bulbapedia has a page on the save structure for Gen 3, including the 4KB save sections that each include data, a checksum, an ID, and an index. The thing is, the offset for the section ID is at 0xFF6, and is 2 bytes long. The offset for the checksum is at 0xFFC, and is 4 bytes long. That means there are 4 bytes between the end of the section ID and the start of the checksum, and, it appears in my battery file which I have inspected in a hex editor, these 4 bytes hold

25 20 01 08

in each of the 28 sections (14 sections per each of 2 save blocks). I can't find any documentation on what this is. Does anyone know what these bytes or for or what that value means?
For context, I'm working on a Fire Red rom hack with well over 420 species (the maximum capacity of the PC), and was thinking of making a utility that can import/export boxes from a save file so a player can kind of hold a living dex without needing to start multiple save files and/or trade many Pokemon individually.

 

[Anon822]

Bulbapedia has a page on the save structure for Gen 3, including the 4KB save sections that each include data, a checksum, an ID, and an index. The thing is, the offset for the section ID is at 0xFF6, and is 2 bytes long. The offset for the checksum is at 0xFFC, and is 4 bytes long. That means there are 4 bytes between the end of the section ID and the start of the checksum, and, it appears in my battery file which I have inspected in a hex editor, these 4 bytes hold

25 20 01 08

in each of the 28 sections (14 sections per each of 2 save blocks). I can't find any documentation on what this is. Does anyone know what these bytes or for or what that value means?
For context, I'm working on a Fire Red rom hack with well over 420 species (the maximum capacity of the PC), and was thinking of making a utility that can import/export boxes from a save file so a player can kind of hold a living dex without needing to start multiple save files and/or trade many Pokemon individually.

I'm guessing it's this value.

 

[yschectman]

Thanks, Anon. I couldn't find documentation anywhere on it. So it looks like it's just a magic number used for checking integrity, and it's the same across all the Gen 3 main entry games.