NeoGamma WAD is likely a specific WAD file that contains a custom level or set of levels created by a game modder. Without more information, I couldn't find any specific details about this particular WAD file.
Before installing a WAD file, your Wii be properly prepared. Installing WADs without these preparations can brick your console.
To grasp the significance of the Neogamma WAD, one must first understand the terminology. In the context of the Nintendo Wii, a "WAD" is a file format that resembles an archive or an installable package. It is the format Nintendo uses for digital games distributed on the Wii Shop Channel (Virtual Console and WiiWare). However, in the homebrew community, WADs are used to install custom channels directly onto the Wii System Menu. The Neogamma WAD, therefore, is a version of the Neogamma backup loader that has been packaged to install as a permanent channel on the console’s dashboard, rather than an application that must be launched through a separate homebrew menu. neogamma wad
Runs burnt DVD-R backups of Wii and GameCube games.
Insert your SD card into your PC. Create a folder named wad on the root of your SD card (if it doesn't already exist). NeoGamma WAD is likely a specific WAD file
NeoGamma WAD = nice shortcut channel, but only install it if you have Priiloader + BootMii, and keep the actual app on your SD card.
However, the installation of WAD files carried a significant stigma and risk within the community, earning the process a reputation for danger. Unlike standard homebrew applications that run from an SD card and cannot permanently damage the system, installing a WAD modifies the Wii’s internal NAND storage. If a WAD is corrupt, or if the user runs out of storage space during installation, the result can be a "banner brick" or a "semi-brick." In these scenarios, the Wii’s System Menu fails to load, rendering the console unusable. Because Neogamma was such a popular tool, countless inexperienced modders bricked their consoles attempting to install the WAD version, leading to a cautious stance from many tutorial writers and scene veterans. Installing WADs without these preparations can brick your
An app such as YAWM ModMii Edition or Multi Mod Manager. The NeoGamma WAD: The specific neogamma_r9.wad file. Step-by-Step Installation Guide (WAD Method)