Recent ML-based approaches (e.g., DEC++, Coda) have been tested on ARM binaries, but not specifically on NDS due to:
swi calls to BIOS) lack semantic labels.Expect no fully automated NDS decompiler in near future.
| Claim | Reality | |-------|---------| | “Decompile NDS games back to source” | False — you get assembly → pseudo-C, not original source. | | “Works like a Java decompiler” | False — NDS is native ARM/Thumb, no bytecode. | | “One-click source” | False — requires hours of manual labeling and restructuring. |
| Use case | Tool | |----------|------| | Learning how NDS games work | Ghidra | | Patching / modding | Ghidra or IDA (disassembly enough) | | Full source reconstruction | Impossible (decompiler helps but won't finish) | | Commercial security analysis | IDA Pro + Hex-Rays | nds decompiler
Review conclusion: NDS decompilers are useful for understanding logic, not for recovering compilable source. Ghidra is the best free option. Adjust your expectations — you’ll be reading pseudo-C of assembly, not clean original code.
The Ultimate Guide to NDS Decompilers: Tools and Techniques An NDS decompiler is an essential tool for reverse engineering Nintendo DS games, allowing developers and hobbyists to translate compiled machine code back into a human-readable high-level language like C or C++. While disassemblers provide a one-to-one translation of binary into assembly code, decompilers use advanced data-flow analysis to reconstruct complex logic, making it significantly easier to understand how a game functions. Essential Tools for NDS Decompilation
Modern reverse engineering has moved beyond simple hex editing to sophisticated toolkits that can rebuild entire projects. Unlocking the Arm9: The Comprehensive Guide to NDS
ds-decomp: A comprehensive toolkit specifically for NDS games. It features commands for extracting ROMs, building them back from source, and handling symbols and modules.
Ghidra: Developed by the NSA, this free, open-source tool is a favorite for hobbyists. It provides both assembly views and a robust decompiler that outputs C-like pseudocode for NDS binaries.
IDA Pro: The industry standard for professional reverse engineering. Its Hex-Rays decompiler is highly accurate but requires a significant financial investment. Small training dataset (few open-source NDS games)
NDSROM: A project aimed at converting NDS resources into common formats and translating game code into readable formats.
Tinke: Highly capable for viewing and editing game resources like models, textures, and sounds within .SDAT files. The Decompilation Process
To successfully decompile an NDS game, you generally follow a multi-step workflow:
Use Ghidra + manual memory map setup for free NDS reverse engineering.
Use IDA Pro + Hex-Rays only if you do NDS RE professionally.