I'm not sure what you mean, but DS Download Play is a bit different:
One game card that supports download play can send a demo of the game to anyone else with a DS nearby. Depending on which game, they could play together.
You can also send demos using the Nintendo Channel on the Nintendo Wii.
$500
no
If it does it like 500 times! Oh, quick tip. Don't say it froze!
yes
On the Game card.
yes
no the dsi has a different charger
yes
gameboy sp or original
At any Game Stop or Best Buy
At a Gamestop or EBGames.
The DSLite cannot play or store music.