How can I play Gameboy Advance games like Pokemon-Pearl,Diamond,Firered etc. games on the computer?

Any site where these games can be downloaded free. Or some real good Pokemon games like these which can be downloaded and played on the comp.eg.Pokemon PC(I have already played it).How can I play Gameboy Advance games like Pokemon-Pearl,Diamond,Firered etc. games on the computer?
If you want to play games such as Pokemon Pearl and Pokemon Diamond, then you would a NDS emulator. An emulator is a program that has the ability to act like others. Anyway, go to this site: www.emulator-zone.com

On the left, you will see names of consoles such as Gamecube, or Wii, etc. For NDS, click on "Nintendo DS", and go to the bottom and choose the download: NO$GBA. This can play NDS and GBA games, but mostly used for NDS. There are some you have to set up to save your game. Anyway, download the file, open up the folder with the file.

Then use this link if you want to know the settings of how to save: http://rs347.rapidshare.com/files/109962960/no_gba_settings.bmp

This is the picture of all of the settings.

Oh, and if there is a error that says "Microphone wave in failure" in the emulator, then check out this link: http://www.youtube.com/watch?v=3JbWmW4bfpc

This is the place to get GBA roms and NDS roms (games): www.doperoms.com

If they don't have it there, type the game name+rom in Google. (Example, Pokemon FireRed rom)
You can download visual boy advance or ideas to play it.Both VBA and ideas are full in google, but pokemon games are not. It appeared in www.4shared.com.How can I play Gameboy Advance games like Pokemon-Pearl,Diamond,Firered etc. games on the computer?
Google GameBoy Emulator and ROMS, I play red, blue, yellow, pearl... gold, silver, ruby red, leaf green lolHow can I play Gameboy Advance games like Pokemon-Pearl,Diamond,Firered etc. games on the computer?
diamond and pearl aren't gba games re