Wii Menu

The Wii System Menu is the top-level menu interface of the Wii game console, allowing the player to navigate/launch channels, change settings, access the message board/address book, use the SD card, and load discs. The channels are displayed on a 4:3 grid with 4 pages, which the player navigates using the wii remote. The grid is customizable; users can move channels (except for the Disc Channel) amongst the menu's 47 customizable slots by pressing and holding the A and B button while hovering over the channel the user wants to move.

Dolphin does not include the Wii System Menu by default, and it doesn't need it; it is able to launch games straight from the Dolphin GUI. However, older Dolphin revisions were capable of emulating the various system menus, even to the point of it being functional. However, as of the 4.0 versions this was broken and the system menu no longer works. For instructions on how to install the Wii System Menu, and for help in performing it, see the Wii System Menu Tutorial on the forums.

Loading games
you cannot load GameCube games from disk channel, other than that it functions properly as of 4.0-1862

No Channels
When first loading a Wii System Menu in Dolphin, it will appear without any channels, except for the Disc Channel. This is because Dolphin doesn't come with channels preinstalled as the Wii does; it's up to the user to install them, using the same process that was used to install the Wii menu.