There are 2 file types use the .NUS3BANK file extension:
1. Super Smash Bros. Audio Bank File
An NUS3BANK file is an audio bank used by Super Smash Bros., a Nintendo game for 3DS and Wii U that features popular video game characters. It contains a collection of audio files referenced during gameplay such as songs or character voices.
You can add and remove audio files in NUS3BANK files used by Super Smash Bros. for Wii U with Sm4shExplorer (you need to have the Sm4shMusic plugin installed). This tool allows you to view the whole filesystem of Super Smash Bros., extract files to a folder, open files with a hex editor, and more.
The NUS3BANK file typically goes unnoticed by the average user. It is most likely only seen by modders who want to alter gameplay and change the audio.
Updated: November 20, 2016
2. Namco Universal Sound 3.0 Bank
A NUS3BANK file is an audio bank included in a Bandai Namco video game. It contains a collection of audio files referenced during gameplay, such as background music and character dialogue. Most notably, NUS3BANK files are used in Super Smash Bros. 4, a popular fighting game for the Nintendo 3DS and Wii U.
While most video game players will never encounter NUS3BANK files, some Super Smash Bros. enthusiasts enjoy extracting, playing, modifying, and creating their own NUS3BANK files. These modders have developed programs that allow them to manipulate and create NUS3BANK files, so they can add custom music and dialogue to Super Smash Bros. 4.
You can use NUS3BANK Editor (Windows) to convert NUS3BANK files to a more common audio format, such as .MP3 or .WAV. Then, you can play the converted files in any media player, such as VideoLAN VLC media player (cross-platform), Microsoft Windows Media Player (Windows), or Apple QuickTime Player (macOS).
If you want to add a custom NUS3BANK file to Super Smash Bros. for Wii U, you can do so using Sm4shExplorer (Windows) with the Sm4shMusic plug-in installed. Sm4shExplorer allows you to view Super Smash Bros.'s file system, extract files to a folder, and add custom files.
If you want to add a custom NUS3BANK file to Super Smash Bros. for 3DS, you can do so using the Smash 3DS Pack (Windows). The Smash 3DS Pack allows gamers to extract and replace files included in Super Smash Bros. for 3DS, including NUS3BANK files.
Updated: May 26, 2021