What discs can you put in a Wii?

The Wii Optical Disc (RVL-006) is the physical game medium for the Wii, created by Panasonic. Nintendo extended its proprietary technology to use a full size 12 cm, 4.7/8.54 GB DVD-based disc, retaining the benefits of the GameCube Game Disc, and adding the standard capacity of a double-layer DVD-ROM.