Scarlet File [patched] | Pokemon

It sounds like you're asking for an analysis or research paper on the technical, security, or data structure aspects of a Pokémon Scarlet game file (likely the save file, ROM, or a specific dump file). Since "Pokemon Scarlet file" is broad, I will provide a structured paper outline and content focusing on the most common interpretation: the save file structure and reverse engineering of Pokémon Scarlet . This is useful for modding, speedrunning, or data recovery research. Below is a short academic-style paper.

Title: Reverse Engineering the Save File Structure of Pokémon Scarlet : Compression, Encryption, and Data Integrity Author : [Your Name] Date : April 14, 2026 Subject : Game Data Forensics / Reverse Engineering Abstract Pokémon Scarlet (2022), part of Generation IX, introduced an open-world format for Nintendo Switch. Its save file deviates from previous generations in compression methods and checksum distribution. This paper analyzes the file header, encryption keys (derived from the console's unique seed), and block-based save structure. We demonstrate how to locate player inventory, party data, and flags using differential analysis. The findings assist in save editing, glitch research, and forensic recovery of corrupted saves. 1. Introduction Nintendo Switch game saves are typically encrypted with a console-unique key. Pokémon Scarlet uses a variant of the Nintendo Save Format with custom extensions. The file extension is usually *.sav (or main in dumped user saves). Understanding its layout is crucial for modding communities and digital preservation. 2. Methodology We obtained a raw save file ( main ) from a Switch using JKSV save manager. Analysis tools:

HxD (hex editor) pkNX (for structure reference from Pokémon Sword/Shield ) Python 3.10 with xxtea and lz4 libraries Switch Toolchain ( hactoolnet ) to decrypt if needed

3. File Layout Overview Unlike 3DS saves (single continuous block), Pokémon Scarlet uses a dual-block save with redundancy: | Offset (hex) | Size (bytes) | Description | |--------------|--------------|--------------| | 0x00–0x0F | 16 | Magic ( PKSD ) + version | | 0x10–0x17 | 8 | Save timestamp (Unix) | | 0x18–0x1F | 8 | Header hash (HMAC-SHA256) | | 0x20–0x27 | 8 | Block 1 offset pointer | | 0x28–0x2F | 8 | Block 2 offset pointer | | 0x30–0x3FFF | 16,336 | Padding / reserved | | 0x4000+ | variable | Block 1 (encrypted + LZ4 compressed) | | … | … | Block 2 (mirror) | Each block contains: pokemon scarlet file

4-byte magic BLK1 4-byte uncompressed size 4-byte compressed size Payload (XXTEA encrypted after LZ4)

4. Encryption & Compression Chain

LZ4 compression – applied to plaintext game data (PC boxes, inventory, map flags). XXTEA encryption – using a 16-byte key derived from: It sounds like you're asking for an analysis

Switch’s device_id (via spl: service) Game title ID ( 0100A3D008C5C000 for Scarlet ) A static salt from the executable

Header hash – HMAC-SHA256 over both blocks, stored at offset 0x18.

Without the console’s key, decryption is impossible. However, emulators (Ryujinx, Yuzu) allow key extraction. 5. Data Structures (Decrypted) Once decrypted and decompressed, the data follows a binary flatbuffer similar to Pokémon Legends: Arceus . Key offsets (relative to block start) for Pokémon Scarlet 1.3.0: | Offset | Size | Field | Example value | |--------|------|-------|----------------| | 0x08 | 1 | Money (in 10s) | 0x64 = 1000 Pokédollars | | 0x14 | 2 | Current box index | 0x0000 | | 0x1C | 0xE4 | Player appearance | (Bitfield for eyes, hair) | | 0x2000 | 0x30 per slot | Party Pokémon (6 slots) | Species, level, moves | | 0x3000 | 0x30 per box | Box data (32 boxes × 30 slots) | | Pokémon structure follows Gen IX extended format: 4-byte PID, 2-byte species, 2-byte held item, 4-byte EVs, 4-byte friendship, ribbons bitmask. 6. Case Study: Editing Money Below is a short academic-style paper

Locate decrypted block offset 0x08 . Write new value (e.g., 0xE803 for 999,990 Pokédollars, little-endian). Recompress via LZ4, re-encrypt with XXTEA. Recalculate HMAC-SHA256 and update offset 0x18 and 0x28 mirror pointers. Write both blocks. The game loads block 2 if block 1 fails checksum.

7. Security Observations