.WII File Extension

The WII format is not supported by Nintendo, the developers of the Wii game console system.

The Asura Engine is a video game development engine created by Rebellion Developments. Many games published by Rebellion and other publishers, such as Electronic Arts, have been developed using the Asura Engine.

Most games developed using the Asura Engine store their audio assets in .ASR files. However, the Wii versions of some games, such as The Simpsons Game, store these assets in WII files instead.

WII files are not meant to be opened by players. Modders have yet to create tools for opening and extracting data from a game's WII files.

You can open a savegame.wii file with MCCToolChest (Windows). To do so:

1. Select File → Open from MCCToolChest's menu bar.
2. In the Open window, select savegame.wii Files from the file type selection menu.
3. Navigate to and open your savegame.wii file.

After you do, the world data your savegame.wii file contains will appear in MCCToolChest.

You can use MCCToolChest to convert the Minecraft: Wii U Edition world a savegame.wii file contains to the world formats used by the Classic and Legacy PlayStation and Xbox versions of Minecraft. For complete instructions on how to do so, refer to MCCToolChest's documentation.