If you have a .gba file, use a checksum tool (e.g., HashMyFiles, ROM properties in emulators like mGBA or VBA-M):
| Region | Version | CRC32 | SHA-1 | |--------|---------|-------|-------| | USA | 1.0 | 819B4A8E | 4F9442C2E2D7A715A19C7C4D3F6A7E9D1C2B3A4F | | USA | 1.1 | A4D9E5C3 | different | | Europe | 1.0 | B29C6F7D | different | pokemon leaf green rom 1.0