DS supreme reign in software sales started 4 weeks ago.
12/26-01/01
1. NDS Brain Training 2 - 414,556 NEW
2. NDS Animal Crossing DS - 205,119 (1,382,228)
3. NDS Mario Kart DS - 168,680 (836,478)
4. PS2 Kingdom Hearts 2 - 156,837 (884,428)
5. NDS Brain Training - 153,189 (1,157,870)
6. PS2 Front Mission 5 - 146,209 NEW
7. NDS Mario & Luigi 2 - 132,726 NEW
8. NDS Gentle Brain Training - 82,789 (935,535)
9. NDS Tamagotchi - 63,433 (784,537)
10. NDS Pokemon Mysterious Dungeon: Blue Rescue Force - 61,154 (572,858)
DS games - 8/10
01/02-01/08
1. NDS Brain Training 2 - 290,021 (704,578)
2. NDS Animal Crossing DS - 132,991 (1,515,219)
3. NDS Mario Kart DS - 114,709 (951,187)
4. NDS Brain Training - 113,860 (1,271,730)
5. NDS Mario & Luigi 2 - 98,434 (231,160)
6. PS2 Kingdom Hearts 2 - 83,200 (967,629)
7. NDS Gentle Brain Training - 62,664 (998,199)
8. NDS Tamagotchi - 61,834 (846,371)
9. NDS Pokemon Mysterious Dungeon: Blue - 57,065 (629,923)
10. GBA Pokemon Mysterious Dungeon: Red - 48,729 (607,185)
DS games - 8/10
01/09-01/15
1. NDS Brain Training 2 - 141,307 (845,885)
2. NDS Animal Crossing DS - 50,032 (1,565,251)
3. NDS Brain Training - 49,774 (1,321,504)
4. NDS Mario Kart DS - 39,182 (990,369)
5. PS2 Gun Parade Orchestra - 35,709 NEW
6. PSP Monster Hunter Portable - 34,937 (377,138)
7. PS2 Kingdom Hearts II - 32,880 (1,000,509)
8. NDS Mario & Luigi 2 - 29,639 (260,799)
9. NDS Gentle Brain Exercises - 25,780 (1,023,979)
10. NDS Tamagotchi Connection: Corner Shop! - 24,550 (870,921)
DS games - 7/10
01/16-01/22
1. NDS Brain Training 2 - 100,538 (946,423)
2. NDS Animal Crossing DS - 79,363 (1,644,614)
3. GCN Super Mario Strikers - 74,209 (74,209)
4. NDS Brain Training - 48,833 (1,370,336)
5. NDS Mario Kart DS - 37821 (1,028,190)
6. PSP Monster Hunter Portable - 28,513 (405,651)
7. NDS Tamagotchi - 22,843 (893,764)
8. NDS Biohazard Deadly Silence - 20,380 (20,380)
9. NDS Gentle Brain Training - 19319 (1,043,298)
10. NDS Mario & Luigi RPG 2 - 18669 (279,468)
DS games - 8/10
I dont think even PS2 had a performance like this in the past.