Looking a bit more, I overestimated Brawl. My new prediction is 250K.
The first weeks will be like this:
250K
150K
100K
150K
650K total for first month, 250K first week.
Hardware - no boost at all
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS