Just got a DS... Hold the applause... Just need some answers :P

[Oyvoyvoyv]

Sorry to come into your thread and ask a question, but otherwise I'd have to make a thread.

I was in a store lately, and heard the clerk talking about the demo of Mp:h that comes with your DS. And no, this wasn't a game, it was built in or something. Is that true? How can I get the demo for my DS?

Also, is there anything your DS comes with or you can download in some way or anything? 'Cause I don't really get anything with my DS...