| Nintendo GBA cart. |  Killer 3D Pool Model AGB-B3LE-USA | 2005 | DSI Games |
| Nintendo GBA cart. | Killer 3D Pool Model AGB-B3LP | 2005 | Zoo Digital Publishing |
| Nintendo GBA cart. | King Kong - The Official Game of the Movie Model AGB-BKQP-EUR | 2005 | Ubisoft Ent. Montreuil sous Bois, France |
| Nintendo GBA cart. | Kingdom Hearts - Chain of Memories Model AGB-B8CE-USA | 2004 | Square Enix Co., Ltd. Japan |
| Nintendo GBA cart. | Kingdom Hearts - Chain of Memories Model AGB-B8CJ-JPN | 2004 | Square Enix Co., Ltd. Japan |
| Nintendo GBA cart. | Kingdom Hearts - Chain of Memories Model AGB-B8CP-EUR | 2005 | Square Enix Co., Ltd. Japan |
| Nintendo GBA cart. | Kinniku Banzuke - Kimero! Kiseki no Kanzen Seiha Model AGB-AK5J-JPN(RK272-J1) | 2001 | Konami Corp. Japan |
| Nintendo GBA cart. | Kinniku Banzuke - Kongou-kun no Daibouken! Model AGB-AK4J-JPN(RK250-J1) | 2001 | Konami Corp. Japan |
| Nintendo GBA cart. | Kinnikuman II-Sei - Seigi Choujin e no Michi Model AGB-AK2J-JPN | 2002 | Banpresto Japan |
| Nintendo GBA cart. | Kirby & the Amazing Mirror Model AGB-B8KE-USA | 2004 | Nintendo of America, Inc. USA 45496 |
| Nintendo GBA cart. | Kirby & the Amazing Mirror Model AGB-B8KP | 2004 | Nintendo Co., Ltd. Japan |
| Nintendo GBA cart. | Kirby - Nightmare in Dream Land Model AGB-A7KE-USA | 2002 | Nintendo of America, Inc. USA 45496 |
| Nintendo GBA cart. | Kirby - Nightmare in Dream Land Model AGB-A7KP | 2003 | Nintendo Co., Ltd. Japan |
| Nintendo GBA cart. | Kisekko Gurumii - Chesty to Nuigurumi-tachi no Mahou no Bouken Model AGB-A2VJ-JPN | 2003 | MTO, Inc. Japan |
| Nintendo GBA cart. | Kiss x Kiss Seirei Gakuen Model AGB-B2KJ-JPN | 2004 | Bandai Co., Ltd. Japan |
| Nintendo GBA cart. | Kiwame Mahjong Deluxe - Mirai Senshi 21 Model AGB-AKMJ-JPN | 2001 | Athena Co., Ltd. Japan |
| Nintendo GBA cart. |  Klonoa - Empire of Dreams Model AGB-AKLE-USA | 2001 | NAMCO Hometek, Ltd. USA |
| Nintendo GBA cart. | Klonoa - Empire of Dreams Model AGB-AKLP | 2001 | NAMCO, Ltd. Japan |
| Nintendo GBA cart. | Klonoa 2 - Dream Champ Tournament Model AGB-AN6E-USA | 2005 | NAMCO, Ltd. Japan |
| Nintendo GBA cart. | Klonoa Heroes - Densetsu no Star Medal Model AGB-Ak7J-JPN | 2002 | NAMCO, Ltd. Japan |
| Nintendo GBA cart. | Knights' Kingdom Model AGB-BKNE-USA | 2004 | T-HQ, Inc. Toy HeadQuarters |
| Nintendo GBA cart. | Knights' Kingdom Model AGB-BKNP | 2004 | T-HQ, Inc. Toy HeadQuarters |
| Nintendo GBA cart. | Koinu to Issho - Aijou Monogatari Model AGB-BDIJ-JPN | 2003 | Culture Brain |
| Nintendo GBA cart. | Koinu to Issho 2 Model AGB-BI2J-JPN | 2004 | Culture Brain |
| Nintendo GBA cart. | Koinu-chan no Hajimete no Osanpo - Koinu no Kokoro Ikusei Game Model AGB-BISJ-JPN | 2003 | TDK Core |
| Nintendo GBA cart. | Konami Arcade Game Collection Model AGB-AKCJ-JPN | 2002 | Konami Corp. Japan |
| Nintendo GBA cart. | Konami Collector's Series - Arcade Advanced Model AGB-AKCE-USA | 2002 | Konami Corp. Japan |
| Nintendo GBA cart. | Konami Collector's Series - Arcade Classics Model AGB-AKCP-EUR | 2002 | Konami Corp. Japan |
| Nintendo GBA cart. | Konami Krazy Racers Model AGB-AKWE-USA | 2001 | Konami Corp. Japan |
| Nintendo GBA cart. | Konami Krazy Racers Model AGB-AKWP | 2001 | Konami Corp. Japan |
| Nintendo GBA cart. | Konami Wai Wai Racing Advance Model AGB-AKWJ-JPN(RK212-J1) | 2001 | Konami Corp. Japan |
| Nintendo GBA cart. | Konchuu Monster Battle Master Model AGB-BQBJ-JPN | 2005 | Culture Brain |
| Nintendo GBA cart. | Konchuu Monster Battle Stadium Model AGB-BQSJ-JPN | 2005 | Culture Brain |
| Nintendo GBA cart. | Konchuu no Mori no Daibouken - Fushigi na Sekai no Juunin-tachi Model AGB-BQKJ-JPN | 2005 | Culture Brain |
| Nintendo GBA cart. | Kong - King of Atlantis Model AGB-BK7E-USA | 2005 | Majesco Ent. Co. |
| Nintendo GBA cart. | Kong - King of Atlantis Model AGB-BK7P | 2005 | Majesco Ent. Co. |
| Nintendo GBA cart. | Kong - The 8th Wonder of the World Model AGB-BKQE-USA | 2005 | Ubisoft Ent. Montreuil sous Bois, France |
| Nintendo GBA cart. | Kong - The Animated Series Model AGB-AKQE-USA | 2002 | BAM! Ent. |
| Nintendo GBA cart. | Konjiki no Gashbell! Makai no Bookmark Model AGB-BKBJ-JPN | 2004 | Banpresto Japan |
| Nintendo GBA cart. | Konjiki no Gashbell! Unare! Yuujou no Zakeru 2 Model AGB-BGYJ-JPN | 2004 | Banpresto Japan |
