Use Tinke or NDT (Nintendo DS Toolkit) to extract graphics, sounds, text, and level scripts. Many NDS games store game logic in interpreted scripts (Lua, or custom bytecode), not compiled ARM. If you extract the script, you effectively "decompiled" the game's behavior without touching assembly.
No essay on decompilation is complete without addressing the legal quagmire. In the United States, the Digital Millennium Copyright Act (DMCA) prohibits circumventing copy protection. However, the Librarian of Congress has granted exemptions for the purpose of "preserving and maintaining" video games that require server-side or obsolete hardware access. Decompilation for interoperability (e.g., to make a game run on a new platform) is legally defensible under fair use in some jurisdictions, following the precedent of Sega v. Accolade (1992).
Practically, Nintendo is notoriously litigious. Distributing decompiled source code from a commercial NDS game is almost certainly a violation of copyright, as it is a derived work. However, publishing a description of how a game works, or a set of patches that modify the original binary, occupies a safer, albeit grey, area. Most ethical NDS reverse engineers abide by two rules: nds decompiler
The future of NDS decompilation lies in Machine Learning. Recent research into neural decompilers (e.g., using transformer models to translate assembly to C) shows promise. A model trained on thousands of compiled NDS homebrew programs (where the source is available) could learn to reverse the compilation process far more effectively than static rule-based systems. Additionally, binary lifting frameworks like Remill or MCSema can lift ARM machine code into a platform-agnostic intermediate representation (LLVM IR), opening the door to powerful analysis and recompilation for modern systems.
In 2004, the Nintendo DS (NDS) changed portable gaming. With dual screens, a touch interface, and a clamshell design, it became one of the best-selling handhelds of all time. Under the hood, however, the NDS was a powerful (for its era) dual-processor system: an ARM9 for main game logic and an ARM7 for I/O and sound. Use Tinke or NDT (Nintendo DS Toolkit) to
Today, thousands of NDS games are abandonware—no longer sold, with source code locked in corporate vaults or lost to hard drive crashes. This is where the quest for an NDS decompiler begins. But if you type that phrase into Google, you will be met with confusion, outdated forum posts, and a fundamental misconception.
The hard truth: There is no magic "decompiler" button that turns a .nds ROM back into clean, human-readable C++ source code. The future of NDS decompilation lies in Machine Learning
However, that does not mean the field is empty. This article will explore what actually exists, the tools you can use, the difference between disassemblers and decompilers, and the practical workflow for reverse engineering an NDS game.