An "Undub" is a specific type of ROM hack. In the case of SMT IV, creators meticulously swapped the localized English voice files with the high-quality Japanese assets. This allows players to experience the vocal performances of legendary Japanese seiyuu while still being able to navigate the complex menus and story beats in English.
Sites like GBAtemp or specialized ROM hacking forums are the best places to find the actual patch files.
A decrypted ROM is essential if you plan to apply further patches, such as HD texture packs or custom cheats. How to Play SMT IV Undub Safely shin megami tensei iv undub 3ds decrypted rom free
If you are looking for a "decrypted" version of the ROM, it is likely because you are using the Citra emulator or a similar PC-based environment.
While searching for "free" downloads is common, it is important to prioritize the safety of your hardware and your data. An "Undub" is a specific type of ROM hack
Have had the encryption keys bypassed, allowing the emulator to read the game data directly.
Restores the intended emotional weight of the Japanese script. Sites like GBAtemp or specialized ROM hacking forums
Usually encrypted to work only on native 3DS hardware.