Here is one of the rarest Nintendo DS not for resales around. This one recently was surfaced a year back and hasn't been seen since once again. It was not apart of any known master not for resale lists until now.
It is a legitimate demo of the game. Not sure why this is so rare or what the deal is with it's rarity. It is also not known if it had a back sticker or not. Mostly likely it did, since it was a demo.
More info is needed to fully verify this demo.