"Super Smash Bros. Brawl.wad" is essentially a .wad file associated with the game Super Smash Bros. Brawl. This file can be used for various purposes, including:

The most famous .wad incarnations of Brawl are but launcher WADs for mods :

If you meant a specific mod like “Brawl Minus” or “Project M” repacked as WAD for a Wii menu channel, specify that—the usage differs significantly.

Disclaimer: This article does not condone piracy. We are discussing the technical process of backing up software you own.