| Nintendo GBA cart. |  Hi Hi Puffy AmiYumi Model AGB-BHHJ-JPN | 2005 | D3 Publisher, Inc. |
| Nintendo GBA cart. | Hobbit no Bouken - Lord of the Rings - Hajimari no Monogatari Model AGB-AH9J-JPN(RK352-J1) | 2005 | Konami Corp. Japan |
| Nintendo GBA cart. | Hudson Best Collection Vol. 1 - Bomberman Collection Model AGB-B7IJ | 2005 | Hudson Soft. Hudson Group Japan |
| Nintendo GBA cart. | Hudson Best Collection Vol. 3 - Action Collection Model AGB-B73J-JPN | 2005 | Hudson Soft. Hudson Group Japan |
| Nintendo GBA cart. | Hudson Best Collection Vol. 4 - Nazotoki Collection Model AGB-B74J-JPN | 2005 | Hudson Soft. Hudson Group Japan |
| Nintendo GBA cart. | Hudson Best Collection Vol.2 - Lode Runner Collection Model AGB-B72J-JPN | 2005 | Hudson Soft. Hudson Group Japan |
| Nintendo GBA cart. | Hugo - The Evil Mirror Advance Model AGB-AHJE-USA | 2005 | NAMCO, Ltd. Japan |
| Nintendo GBA cart. | Hugo 2 in 1 Model AGB-B2HP-EUR | 2005 | ITE Media |
| Nintendo GBA cart. | It's Mr. Pants Model AGB-BPIE-USA | 2005 | T-HQ, Inc. Toy HeadQuarters |
| Nintendo GBA cart. | It's Mr. Pants Model AGB-BPIP | 2005 | T-HQ, Inc. Toy HeadQuarters |
| Nintendo GBA cart. | James Pond - Codename RoboCod Model AGB-AJDE-USA | 2005 | Valcon Games |
| Nintendo GBA cart. | James Pond - Codename RoboCod Model AGB-AJDP | 2005 | Play It |
| Nintendo GBA cart. | Juka and the Monophonic Menace Model AGB-BJKE-USA | 2005 | SouthPeak Interactive, LLC |
| Nintendo GBA cart. | Juka and the Monophonic Menace Model AGB-BJKP | 2005 | Zoo Digital Publishing |
| Nintendo GBA cart. | Kappa no Kai-kata - Kaatan Daibouken! Model AGB-BK8J-JPN(RK372-J1) | 2005 | Konami Corp. Japan |
| Nintendo GBA cart. | Kessaku Sen Ganbare Goemon 1, 2 - Yuki Hime to Magginesu Model AGB-BG2J-JPN(RK370-J1) | 2005 | Konami Corp. Japan |
| Nintendo GBA cart. | Kid Paddle Model AGB-BYLP-EUR | 2005 | Atari Interactive, Inc. |
| Nintendo GBA cart. | Kid's Cards Model AGB-BCXE-USA | 2005 | Majesco Ent. Co. |
| Nintendo GBA cart. | Kidou Gekidan Harouza Haro Ichiza - Haro no Puyo Puyo Model AGB-BH6J-JPN | 2005 | Bandai Co., Ltd. Japan |
| 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-B8CP-EUR | 2005 | Square Enix Co., Ltd. Japan |
| Nintendo GBA cart. | Klonoa 2 - Dream Champ Tournament Model AGB-AN6E-USA | 2005 | NAMCO, Ltd. 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. | Konjiki no Gashbell!! The Card Battle for GBA Model AGB-BKEJ-JPN | 2005 | Banpresto Japan |
| Nintendo GBA cart. | Konjiki no Gashbell!! Yuujou no Zakeru - Dream Tag Tournament Model AGB-BUDJ-JPN | 2005 | Banpresto Japan |
| Nintendo GBA cart. | Kouchu Ouja Mushiking - Greatest Champion e no Michi Model AGB-BK6J-JPN | 2005 | SEGA Corp. |
| Nintendo GBA cart. | Kunio Kun Nekketsu Collection 1 Model AGB-B9AJ-JPN | 2005 | Atlus Co., Ltd. Japan |
| Nintendo GBA cart. | Kunio Kun Nekketsu Collection 2 Model AGB-B9BJ-JPN | 2005 | Atlus Co., Ltd. Japan |
| Nintendo GBA cart. | Legendz - Sign of Nekuromu Model AGB-BLVJ-JPN | 2005 | Bandai Co., Ltd. Japan |
| Nintendo GBA cart. | LEGO Star Wars - The Video Game Model AGB-BLWE-USA | 2005 | Eidos Interactive |
| Nintendo GBA cart. | LEGO Star Wars - The Video Game Model AGB-BLWJ-JPN | 2005 | Eidos Interactive |
| Nintendo GBA cart. | LEGO Star Wars - The Video Game Model AGB-BLWP | 2005 | Eidos Interactive |
| Nintendo GBA cart. | Let's Ride Sunshine Stables Model AGB-B34E-USA | 2005 | T-HQ, Inc. Toy HeadQuarters |
