Because this is a mod, it cannot be bought. You must own a copy of the original New Super Mario Bros. Wii and have a homebrew-enabled console.
: You can now play as Wario and Waluigi in multiplayer modes. How to Install and Play mario 39s final adventure wii wbfs new
: Get the mod files from GameBanana and download the Riivolution app. Because this is a mod, it cannot be bought