The devices known as Flash Advance Linkers and GBA Flash Cards enable the Gameboy Advance console to read and write Gameboy Advance game ROMs from a PC. The connection is carried out via the printer port or the USB of the personal computer, and the ROMs employed are available online, in the same manner that music files such as MP3s are found and shared on the web.
The site gives all the information on how to use Flash Cards, including a step-by-step tutorial that comes complete with screenshots for additional clarity, and which explains what can and can not be done with a GBA Flash Card. Likewise, it lets the user compare features and compatibility of cartridges by means of a set of tables where comparisons are made, and advice is given on which card is more versatile. The site also gives a full low-down on gameboy accessories such as lights and TV tuners, and it has links of interest, such as pages that feature NES ROMs for download. 
