Anyway GBA emulators are good for playing old games even if you don't have. There is also a DS emulator if anyone was thing to get one.
Edit: Theres about all of the rom emulators now. Like Gamecube, DSi, Wii, Any game device made by Nintendo have an emulator now. The only GOOD reason to buy a game at the store is so you can put it in whatever crap you have and play it portably, such as Gameboy Versions or DS/DSi.