| Travel Games for Dummies (Europe) (En,Fr,De,Es,It) | |
| Travel Games for Dummies (USA) | |
| Treasure Gaust - Gaust Diver - Crimson Red (Japan) | |
| Treasure Gaust - Gaust Diver - Deep Blue (Japan) | |
| Treasure World (USA) | |
| Treasures of Montezuma, The (Europe) (En,Fr,De,Es,It,Nl) | |
| Trick - DS Ban - Kakushigami no Sumu Yakata (Japan) | |
| Trioncube (Europe) (En,Fr,De,Es,It) | |
| Trioncube (USA) | |
| Tron - Evolution (Europe) (En,Fr,De,Es,It,Nl) (NDSi Enhanced) | |
| Tropical Lost Island (Europe) (En,De,Nl) | |
| Tropix! ...Your Island Getaway (USA) (En,Fr,De,Es,It) | |
| True Swing Golf (USA) (En,Ja,Fr,De,Es,It) | |
| Tsubasa Chronicle (Japan) | |
| Tsubasa Chronicle Vol. 2 (Japan) | |
| Tsuji Gakuen Tsuji Cooking Kanshuu - Koharu no DS Uchigohan. - Shokuji Balance Guide Tsuki (Japan) | |
| Tsukibito (Japan) | |
| Tsumiki - The Infernal Tower (Europe) (En,Fr,De,Es,It) | |
| Tsunagete! Pipe Mania (Japan) | |
| Tsunde Tsumikiss (Japan) | |
| Tsuzuke Rarenai Otona no Tame no Metabo Dasshutsu Training (Japan) | |
| Turn It Around (Europe) | |
| Turn It Around (USA) | |
| Tus Amigos de Disney (Spain) | |
| TV Anime Fairy Tail - Gekitou! Madoushi Kessen (Japan) | |
| Twilight Syndrome - Kinjirareta Toshi Densetsu (Japan) | |
| U-Can - Penji Training DS (Japan) | |
| Uchi no 3 Shimai DS (Japan) | |
| Uchi no 3 Shimai DS 2 - 3 Shimai no Odekake Daisakusen (Japan) | |
| Uchida Yasuo DS Mystery - Meitantei Asami Mitsuhiko Series 'Fukutoshin Renzoku Satsujin Jiken' (Japan) | |
| Ukkari o Nakusou Bunshou Yomi Training - Yomitore (Japan) | |
| Ultimate Band (Europe) (En,Fr,De,Es,It,Nl) | |
| Ultimate Band (USA) (En,Fr,Es) | |
| Ultimate Game Room (USA) | |
| Ultimate Mortal Kombat (Europe) (En,Fr,De,Es,It) | |
| Ultimate Mortal Kombat (USA) (En,Fr,De,Es,It) | |
| Ultimate Puzzle Games - Sudoku Edition (USA) | |
| Ultimate Spider-Man (Europe) | |
| Ultimate Spider-Man (France) | |
| Ultimate Spider-Man (Germany) | |
| Ultimate Spider-Man (Italy) | |
| Ultimate Spider-Man (Japan) | |
| Ultimate Spider-Man (Spain) | |
| Ultimate Spider-Man (USA) | |
| Umezawa Yukari no Yasashii Igo (Japan) | |
| Umihara Kawase Shun - Second Edition Kanzen Ban (Japan) | |
| Umiuru to Sudoku Shiyo! - Nikoli Gensen 7 Dai Puzzle 555 Mon (Japan) | |
| Undercover - Dual Motives (Europe) (En,Fr,De,Es,It) | |
| Underground Pool (USA) | |
| Underwater Attack (USA) | |