Also Jet Impulse 0852 is the only game that I know of that had online voice chat that did not require friend codes. It's actually a great game that is still pretty enjoyable despite not being able to read the dialogue, and plays a lot like Star Fox 64's open battles. Quite good for an in-house Nintendo game, was supposed to be translated to the west under the title DS Air, but never washed up on our shores. Anyways there is no friend code system as far as I can tell, and its all random match using the wifi, and during combat there is a radio button you can press to transmit a short message. Ive only played against japanese gamers who were reluctant to talk to me, but it works pretty good. Pretty neat for not requiring friend codes. But that could be due to my lack of understanding the menus completely. Still its a great game worth checking out for the singleplayer mode alone.