An emulator inside your emulator? Dolphin just got Game Boy Player support.

The Dolphin emulator lets you run GameCube titles, but it now supports Game Boy Advance games thanks to Game Boy Player ...
Engadget

Qbus GameBoy Advance flashwriter and emulator

The Qbus Flash Card is a $90 device that serves as a GameBoy Advance emulator and flashwriter used in conjunction with your PC. It hooks in via USB and allows you to test out GBA games downloaded from ...
Ars Technica

What's the best way to play GBA games? (eg. using a NDS, PSP, or PC)

I'm looking to play a bunch of older Gameboy Advance games and I have a bunch of different options...<br><br>1) Nintendo DS:<br> Pros: 100% compatibility, no need to use an emulator (and obtain ROMs, ...
siliconera

Korea gets repackaged GBA games sold as a single PC release

While the Nintendo DS is popular in Korea, the Game Boy Advance was never officially released there. However, the PC is king and there are plenty of available emulators available that can play GBA ...