Pokémon BW Save File Structure
| This article is incomplete. Please feel free to add missing information and complete the article. |
Save Entry
The primary save starts at 0x0. The backup save starts at 0x24000.
Main Save File & Backup
| Start | End | Size | Checksum | Mirror | Description |
| 00000 | 003DF | 3E0 | 003E2 | 23F00 | Box Names |
| 00400 | 013EF | FF0 | 013F2 | 23F02 | Box 1 |
| 01400 | 023EF | FF0 | 023F2 | 23F04 | Box 2 |
| 02400 | 033EF | FF0 | 033F2 | 23F06 | Box 3 |
| 03400 | 043EF | FF0 | 043F2 | 23F08 | Box 4 |
| 04400 | 053EF | FF0 | 053F2 | 23F0A | Box 5 |
| 05400 | 063EF | FF0 | 063F2 | 23F0C | Box 6 |
| 06400 | 073EF | FF0 | 073F2 | 23F0E | Box 7 |
| 07400 | 083EF | FF0 | 083F2 | 23F10 | Box 8 |
| 08400 | 093EF | FF0 | 093F2 | 23F12 | Box 9 |
| 09400 | 0A3EF | FF0 | 0A3F2 | 23F14 | Box 10 |
| 0A400 | 0B3EF | FF0 | 0B3F2 | 23F16 | Box 11 |
| 0B400 | 0C3EF | FF0 | 0C3F2 | 23F18 | Box 12 |
| 0C400 | 0D3EF | FF0 | 0D3F2 | 23F1A | Box 13 |
| 0D400 | 0E3EF | FF0 | 0E3F2 | 23F1C | Box 14 |
| 0E400 | 0F3EF | FF0 | 0F3F2 | 23F1E | Box 15 |
| 0F400 | 103EF | FF0 | 103F2 | 23F20 | Box 16 |
| 10400 | 113EF | FF0 | 113F2 | 23F22 | Box 17 |
| 11400 | 123EF | FF0 | 123F2 | 23F24 | Box 18 |
| 12400 | 133EF | FF0 | 133F2 | 23F26 | Box 19 |
| 13400 | 143EF | FF0 | 143F2 | 23F28 | Box 20 |
| 14400 | 153EF | FF0 | 153F2 | 23F2A | Box 21 |
| 15400 | 163EF | FF0 | 163F2 | 23F2C | Box 22 |
| 16400 | 173EF | FF0 | 173F2 | 23F2E | Box 23 |
| 17400 | 183EF | FF0 | 183F2 | 23F30 | Box 24 |
| 18400 | 18DEB | 9EC | 18DEE | 23F32 | Inventory |
| 18E00 | 19333 | 534 | 19336 | 23F34 | Party Pokemon |
| 19400 | 194AF | B0 | 194B2 | 23F36 | Trainer Data |
| 23F00 | 23F8B | 8C | 23F9A | Checksum Block | |
Start and End indexes are inclusive.
Gym Badge Obtained Date
Gym badge dates are stored starting 1C704 and 407004. Byte 1 is how many years after 2000, Byte 2 is the month, and Byte 3 is the day (Byte 4 is 0, don't know if it has any meaning or if it's part of the year).