For those aiming to start a full-scale decompilation project (aiming for "byte-perfect" source code), ds-decomp is an essential automation suite.
Ed-1T/NDS-Decompilation-Project-Maker: A tool to ... - GitHub nds decompiler
The NDS-Decompilation-Project-Maker is a targeted utility for creating XML-based projects from ROMs. For those aiming to start a full-scale decompilation