Is it possible to play ds games online for free

yes it is possible although you must but a flash card like R4 or Acekard i recommend R4i HAPPY BOX for ds and dsi and XL/LL you can buy it here for a good price http://dsmonkey.com/ p.s you need a micro sd card.you download ds games,movies,music, and mutch more then easilly insert in back of flash cart.thank you