For comparison, here are Famitsu first weeks for Square Enix's non-DQ games on the DS (I'm including FF since it started imploding at the end of the cycle). I also excluded the anime tie-ins that sold like 10-20K LTD to spare them some embarrassment:
Final Fantasy:
Final Fantasy 3: 501,701
Final Fantasy 12: RW: 404,342
Final Fantasy 4: 308,794
FFCC: RoF: 206,439
FFTA2: 158,408
FFG: 4WoL: 119,634
FFCC: EoT: 101,989
FF Fables: CT: 29,065
C&C Mystery Dungeon: 27,770
Chocobo No English Title: 20,200
Other Established Brand:
Kingdom Hearts 358/2: 291,211
Chrono Trigger: 276,049
Itadaki Street: 140,560
Kingdom Hearts: Re:Coded: 119,532
Children of Mana: 105,534
SaGa 2: 100,563
Valkyrie Profile: TAO: 73,779
SaGa 3: 30,322
Front Mission 2089: 20,476
Heroes of Mana: 20,219
Front Mission: 17,715
Lufia: 14,110
New IP:
TWEWY: 81,326
Blood of Bahamut: 31,506
Nanashi No Game: 30,816
Egg Monster Hero: 29,464
Sigma Harmonics: 24,619
Nanashi No Game: Eye: 10,320
Cross Treasures: 7,494