i don't know,it's hard to have a counter argument to "2009 sucked for the ds" let's take a look at a list
http://www.gamerankings.com/browse.html?site=ds&cat=0&year=2009&numrev=0&sort=0&letter=&search=this list is horrible
GTA - meh
Mario & Luigi 3 - meh
Might & magic Clash of heroes - actualy pretty good,should be higher than those two
Spirit tracks - meh
Layton 2 - not as good as the original
Peggle - everybody loves peggle but the tiny ds graphics leave a bit to be desired
Devil Survivor - meeeeeeeeeeeeeeeeeh
Dragon Quest V - good but still it's a remake of an old game
Pokemon Platinum - see my previous post
Rhytm Heaven - WHY IT'S SO FUCKING LOW,JOURNALIST ARE distinguished mentally-challenged!
Henry Hatsworth - meh
Fire Emblem - meh
Retro Game Challenge - actualy good
PS0 - meh
Knights in the nightmare - just no
Scribblenauts - worst game evah
Starfy - meh
Suikoden Tiekresis - an horrible entry to the awesome suikoden franchise
Kingdom hearts 358 - ultra crappy spinoff,feels like an insult when psp gets the one with the new bosses and the new world
Galactrix - haven't heard great thing about it,better played on a big screen
Trackmania DS - don't like racing game
Valkyrie Profile - don't like SRPG,don't like valkyrie profile,double meh
Mario & Sonic Olympic Winter - mehmehmehmehmehmehmehmeh
Nostalgia - i played it trough the end but it really was like the most generic rpg ever
Avalon Code - really disappointing game
the "miss" outnumber the "hit" by a lot,i think my most played DS game this year was the 2009 version of yu-gi-oh and i hope that my most played DS games of 2010 isn't going to be the 2010 version