| Nintendo Game Boy Cart. |  Kaisen Game - Navy Blue 98 Model DMG-A98J-JPN | 1998 | Shouei System Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Kaisen Game - Navy Blue Model DMG-NBA | 1989 | Use Corp. Japan |
| Nintendo Game Boy Cart. | Kakomunja Model DMG-KMJ | 1990 | Naxat Soft. Japan |
| Nintendo Game Boy Cart. | Kamen Rider SD - Hashire! Mighty Riders Model DMG-R6J | 1993 | Yutaka |
| Nintendo Game Boy Cart. | Kandume Monsters Model DMG-AKMJ-JPN | 1998 | I'Max Japan |
| Nintendo Game Boy Cart. | Karakuri Kengouden Musashi Road Model DMG-MUJ | 1991 | Yutaka |
| Nintendo Game Boy Cart. | Karamuchou no Daijiken Model DMG-AKDJ-JPN | 1997 | Starfish, Inc. Japan |
| Nintendo Game Boy Cart. | Kaseki Sousei Reborn Model DMG-AKRJ-JPN | 1998 | Starfish, Inc. Japan |
| Nintendo Game Boy Cart. | Kattobi Road Model DMG-K5J | 1993 | NAMCOT Japan |
| Nintendo Game Boy Cart. | Kawa no Nushi Tsuri 3 Model DMG-A7KJ-JPN | 1997 | Victor Interactive Soft., Inc. |
| Nintendo Game Boy Cart. | Keitai Keiba Eight Special Model DMG-A8GJ-JPN | 1994 | Imagineer Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Ken Griffey Jr. presents Major League Baseball Model DMG-AKGE-USA | 1997 | Nintendo of America, Inc. USA 45496 |
| Nintendo Game Boy Cart. |  Ken Griffey Jr. presents Major League Baseball Model DMG-AKGP-AUS | 1997 | Nintendo Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Kenyuu Densetsu Yaiba Model DMG-YYJ | 1994 | Banpresto Japan |
| Nintendo Game Boy Cart. | Kid Dracula Model DMG-DF-UKV | 1993 | Konami Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Kid Dracula Model DMG-DF-USA | 1993 | Konami, Inc. USA |
| Nintendo Game Boy Cart. | Kid Icarus of Myths and Monsters Model DMG-KA-UKV | 1991 | Nintendo Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Kid Icarus of Myths and Monsters Model DMG-KA-USA | 1991 | Nintendo of America, Inc. USA 45496 |
| Nintendo Game Boy Cart. | Kidou Keisatsu Patlabor - Nerawareta Machi 1990 Model DMG-MOJ | 1990 | Yutaka |
| Nintendo Game Boy Cart. | Kikou Keisatsu Metal Jack Model DMG-M5J | 1992 | Takara Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Killer Instinct Model DMG-AKLE-USA | 1995 | Nintendo of America, Inc. USA 45496 |
| Nintendo Game Boy Cart. | Killer Instinct Model DMG-AKLP-EUR | 1995 | Nintendo of Europe GmbH 45496 |
| Nintendo Game Boy Cart. | Killer Instinct Model DMG-AKLP-UKV | 1995 | Nintendo Co., Ltd. Japan |
| Nintendo Game Boy Cart. | King James Bible | 1994 | Wisdom Tree, Inc. CA, USA |
| Nintendo Game Boy Cart. | King of the Zoo Model DMG-PW-NOE | 1990 | Nintendo of Europe GmbH 45496 |
| Nintendo Game Boy Cart. | Kingdom Crusade Model DMG-KC-USA | 1992 | Electro Brain Corp. |
| Nintendo Game Boy Cart. | Kingyo Chuuihou Wapiko no Wakuwaku Stamp Rally! Model DMG-KTJ | 1991 | Yutaka |
| Nintendo Game Boy Cart. | Kingyo Chuuihou! 2 - Gyopi-chan o Sagase! Model DMG-KJJ | 1992 | B-AI |
| Nintendo Game Boy Cart. | Kinin Koumaroku Oni Model DMG-ONJ | 1990 | Banpresto Japan |
| Nintendo Game Boy Cart. | Kinnikuman - The Dream Match Model DMG-KWJ | 1992 | Yutaka |
| Nintendo Game Boy Cart. | Kirby no Block Ball Model DMG-AKXJ-JPN | 1995 | Nintendo Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Kirby no Kirakira Kids Model DMG-AKCJ-JPN | 1997 | Nintendo Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Kirby no Pinball Model DMG-K9J | 1993 | Nintendo Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Kirby's Block Ball Model DMG-AKXE-USA | 1995 | Nintendo of America, Inc. USA 45496 |
| Nintendo Game Boy Cart. | Kirby's Block Ball Model DMG-AKXP-UKV | 1995 | Nintendo Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Kirby's Dream Land 2 Model DMG-AKBE-USA | 1995 | Nintendo of America, Inc. USA 45496 |
| Nintendo Game Boy Cart. | Kirby's Dream Land 2 Model DMG-AKBP-NOE | 1995 | Nintendo of Europe GmbH 45496 |
| Nintendo Game Boy Cart. | Kirby's Dream Land Model DMG-KY-ESP-1 | 1992 | Nintendo Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Kirby's Dream Land Model DMG-KY-EUR | 1992 | Nintendo of Europe GmbH 45496 |
| Nintendo Game Boy Cart. | Kirby's Dream Land Model DMG-KY-NOE | 1992 | Nintendo of Europe GmbH 45496 |
