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:
In ARM binaries, data (like image pointers) is often mixed with code. If a decompiler tries to read an image as code, it produces "garbage" output. Legal Sensitivity: nds decompiler
The Ultimate Guide to NDS Decompilers: Tools and Techniques for DS Reverse Engineering Practically, Nintendo is notoriously litigious
The Homebrew scene is the ethical safe harbor: decompile your own NDS programs to study compilation, or decompile open-source DS demos. Most ethical NDS reverse engineers abide by two
Decompiling a Nintendo DS (NDS) game is a multi-step process that has become significantly more accessible with modern tools. Unlike simple "one-click" decompilers for high-level languages, NDS decompilation involves unpacking the ROM, decrypting its contents, and then using a reverse engineering suite to turn binary code back into readable C or assembly. 1. Essential Tools for Your Toolkit
Decompiling NDS games is a complex task due to the console's proprietary architecture and the use of custom compilers and tools. Some of the challenges include: