The Game Boy Advance Wireless Adapter is an accessory for the Game Boy Advance, and was released by Nintendo in 2004. It provides an alternative to the Game Boy Advance Game Link Cable, but does not enjoy the same popularity due to a number of issues. The Game Boy Advance Wireless Adapter is also compatible with the Game Boy Advance SP , Game Boy Player, and e-Reader.
Like the Game Boy Advance Game Link Cable, this device allows for multiplayer gaming with the Game Boy Advance, and attaches via the External Extension Connector. The range of this adapter is short compared to the built-in wireless function of the Nintendo DS; Nintendo recommends players stay within 10 ft. (about 3m) of each other for best results. Note that due to the Game Boy Micro's different style link cable port, the Game Boy Advance Wireless Adapter will not attach to it. However, a Game Boy Micro Wireless Adapter is available for the Micro which is compatible for linking with the Game Boy Advance Wireless Adapter. Neither wireless adapter can connect with the Nintendo DS since the DS does not support multiplayer mode in Game Boy Advance games.
One of the wireless adapter's greatest uses is in Pokémon FireRed, LeafGreen, and Emerald. While all three still support the Game Boy Advance Game Link Cable, up to thirty-nine wireless adapter-connected players can convene in a virtual in-game lobby called the "Union Room" for battles and trades. The wireless adapter is also used in Pokémon games to download special data via the Mystery Gift option at various Pokémon-related events. Besides the Union Room in certain Pokémon versions, the wireless adapter only supports up to five players.
A major drawback of the Game Boy Advance Wireless Adapter is that it is not backwards compatible; that is, it will only work with games that have been programmed to support the wireless adapter, excluding all older model Game Boy games. As of July 2009, only about 30 Game Boy Advance games support the wireless adapter, and many of the supported games are those in the bit Generations series (Japan only) and the Classic NES Series.