A new emulator for the Wii that emulates the original Gameboy line has been released. The major feature with this emulator is that it emulates up to four units at once and can connect them in pairs via an emulated link cable! This means you can play multiplayer Gameboy games (or trade between those that supported it) on your Wii.
QUOTE(Features)
Supports Gameboy, Gameboy color and SuperGameboy games.
Runs up to 4 gameboys side by side!
Gameboy 1 and 2 are linked with a link cable, so are gameboy 3 and 4.