TGB Dual is one of the first Game Boy Color emulators to add support for the Game Boy Link function. Like the other emulators that have now implemented, the linking function works over the Internet.
While not a integral function for the Game Boy to operate it does allow some of the finer features of games such as Pokemon to work. The emulator also has support for a vast variety of games, however the emulator has been known to be prone to crashing.
While the latest version of the emulator is only in Japanese, someone has gone and translated an earlier version that we have been able to also provide here.