The release date for Pokémon Emerald has been scheduled for the 1st of May, 2005 in the US.
However, there is a special offer under the name of “Frontier Battle Gear” for those who pre-order the game ;
it includes the Pokémon Emerald Game Pak, a Collector’s Tin case for your GBA SP, and an official Frontier
Battle Pass, along with a personal guide to the Battle Fontier. Finally, the usual VIP Card that permits access
to unique online content.
So save up your money!
Source: EBGames
Check out the Legendary Pokémon .net article concerning Emerald’s features here.