Nds Decompiler -

NDS decompiler is a specialized tool used to reverse-engineer Nintendo DS (NDS) ROM files. Its primary goal is to convert the machine-executable code found in a ROM back into a human-readable format, such as assembly language Decompilation is a critical part of the ROM hacking

For NDS homebrew or commercial games, no full, production-ready decompiler exists. The state of the art is high-quality disassembly with partial decompilation. nds decompiler

Decompiling an NDS ROM isn't a one-click process. It typically follows these stages: How to reverse engineer your favourite game NDS decompiler is a specialized tool used to

The Extreme: Manual Reimplementation Some titles, such as the Phoenix Wright: Ace Attorney series, have had their scripting engines fully reverse-engineered, leading to fan-translation tools. This was not achieved by a decompiler but by understanding the data structures, then writing custom extractors and injectors. The code itself was never decompiled; only the assets were repurposed. Loader: parses the NDS ROM header

There are some existing tools and projects that can help with NDS decompilation:

• Loader: parses the NDS ROM header, filesystem (NitroFS/arm9/arm7 binaries), and locates sections (.text/.data/.rodata).
• Disassembler: converts ARM7/ARM9 machine code into assembly instructions (ARM/Thumb).
• Decompiler/pseudocode generator: attempts to lift assembly into higher-level constructs (functions, loops, conditionals) producing pseudocode.
• Data recovery: detects and parses common data types used in NDS games (tilemaps, palettes, compressed graphics like LZ77, ADPCM/PCM audio, scripting bytecode).
• Asset exporters: convert discovered graphics and audio into standard formats (PNG, WAV) and extract text (for localization).
• Scripting and pattern libraries: signatures that recognize known engine patterns, middleware, or library functions to improve reconstruction quality.
• UI/analysis tools: cross-references, call graphs, hex views, and patching support.