VBA Stands for : Visual Boy Advance.
Visual Boy Advamced is an Emulator (copycat acts like the console) Version of Nintendo's Game Boy Advance That is Playable on Computers (there are more Xbox 360 PS3 Nintendo DS But we'll open up more sites later on!).

In a Nutshell : It's Gameboy Advance..But on YOUR Computer! Isn't that great?!

You can play all the games that are published on the GBA for FREE !, Pokemon, Super Mario And Donkey Kong! Anything!

The Game's are Called "ROMS" Which stands for "Read Only Memory"

With VBA There is a "Link up" Option Which Allows You to play With up to 4 Players Online over The Internet!!

The Process is a bit Complicated your first try But i'll be posting a Guide..With links to VBA and several Websites for downloading games!