| Just in Time Translations - Say It in 6 Languages (USA) | |
| Just Sing! (Europe) (En,Fr,De,Nl) (NDSi Enhanced) | |
| Justice League Heroes (Europe) (En,Fr,De,Es,It) | |
| Justice League Heroes (USA) | |
| Juushin Enbu DS (Japan) | |
| Juushinden - Ultimate Beast Battlers (Japan) | |
| K-1 World GP - Zettai Ouja Ikusei Keikaku (Japan) | |
| K11 - Kommissare im Einsatz (Germany) | |
| K3 en het IJsprinsesje (Netherlands) | |
| Kabu Trader Shun (Japan) | |
| Kabushiki Baibai Trainer - Kabutore! (Japan) | |
| Kabushiki Baibai Trainer - Kabutore! Next (Japan) | |
| Kachou Shima Kosaku DS - Dekiru Otoko no Love & Success (Japan) | |
| Kage no Densetsu - The Legend of Kage 2 (Japan) | |
| Kageyama Hideo no Hanpuku Ondoku - DS Eigo - Shougaku Eigo Hisshuu Drill (Japan) | |
| Kageyama Hideo no IQ Teacher DS - Kangaeru Chikara to Oboeru Chikara (Japan) | |
| Kaidan Restaurant - Ura Menu 100-sen (Japan) | |
| Kaijuu Busters (Japan) | |
| Kaijuu Busters Powered (Japan) | |
| Kaite Oboeru - Doragana (Japan) | |
| Kaite, Shabette, Hajimeyou! - Monster Farm DS (Japan) | |
| Kaitou Rousseau (Japan) | |
| Kaitou Wario the Seven (Japan) | |
| Kakikomi Shiki - 'Hannya Shingyou' Renshuuchou DS (Japan) | |
| Kakko Yoku Narou - Kaku-chan Shiki - Kintore Navi (Japan) | |
| Kakuromaniacs (Europe) (En,Fr,De,Es,It) | |
| Kakushi E Mystery - Riku to Yohan - Kieta 2-mai no E (Japan) | |
| Kalle Kunskap - 4-7 Aar (Europe) (Sv,No,Da,Fi) | |
| Kameleon (Europe) | |
| Kamen Rider - Dragon Knight (USA) (En,Fr,Es) | |
| Kamen Rider Battle - GanbaRide - Card Battle Taisen (Japan) | |
| Kamonohashikamo. - Aimai Seikatsu no Susume (Japan) | |
| Kanbayashi Shiki Nouryoku Kaihatsu Hou - Unou Kids DS (Japan) | |
| Kangaeru Chikara o Gun Gun Nobasu! - DS Youji no Noutore (Japan) | |
| Kanji no Wataridori (Japan) | |
| Kanji no Wataridori (Japan) (Rev 1) | |
| Kanji Sonomama - DS Rakubiki Jiten (Japan) | |
| Kankyou Jidai no Koushiki Kentei - Eco Kentei DS - Tokyo Shoukou Kaigisho Kanshuu (Japan) | |
| Kanshuu - Shuukan Pro Wrestling - Pro Wrestling Kentei DS (Japan) | |
| Kanshuu Nihon Joushiki Ryoku Kentei Kyoukai - Imasara Hito ni wa Kikenai - Otona no Joushiki Ryoku Training DS (Japan) | |
| Kanshuu Nihon Joushiki Ryoku Kentei Kyoukai - Imasara Hito ni wa Kikenai - Otona no Joushiki Ryoku Training DS (Japan) (Rev 1) | |
| Kantan! Tanoshii! - Okashi Navi DS (Japan) | |
| Karada, Yorokobu Shokuji & Exercise - Kenkou Kentei (Japan) | |
| Karasawa Shunichi no Zettai ni Ukeru!! - Zatsugakuen DS (Japan) | |
| Kaseki Chou Shinka - Spectrobes (Japan) | |
| Katei de Dekiru! Chomeijin Yuumei Ryourinin no Original Recipe - Shokusai Roman (Japan) | |
| Katekyoo Hitman Reborn! DS - Fate of Heat - Honoo no Sadame (Japan) | |
| Katekyoo Hitman Reborn! DS - Fate of Heat II - Unmei no Futari (Japan) | |
| Katekyoo Hitman Reborn! DS - Fate of Heat III - Yuki no Shugosha Raishuu! (Japan) | |
| Katekyoo Hitman Reborn! DS - Flame Rumble - Kaien Ring Soudatsusen! (Japan) | |