| Kinniku Banduke - Muscle Ranking 2 (J)(Independent) | |
| Kinnnikuman Nisei Seigi Choujin he no Michi (J)(Polla) | |
| Kirby - Nightmare in Dreamland (E)(Surplus) | |
| Kirby - Nightmare in Dreamland (U)(Mode7) | |
| Kirby & The Amazing Mirror - Oops! All Mix! | |
| Kirby & the Amazing Mirror (Proto) | |
| Kirby And The Amazing Mirror (E)(Rising Sun) | |
| Kirby And The Amazing Mirror (U)(Rising Sun) | |
| Kirby in Sonic battle! | |
| Kirby Red Diamond | |
| Kisekae Angel (J)(Caravan) | |
| Kisekko Gurumi (J)(Mugs) | |
| Kiss x Kiss Seirei Gakuen (J)(Caravan) | |
| Klonoa - Empire of Dreams (E)(Rocket) | |
| Klonoa - Empire of Dreams (J)(Eurasia) | |
| Klonoa - Empire of Dreams (U)(Mode7) | |
| Klonoa 2 - Dream Champ Tournament (U)(Venom) | |
| Klonoa Heroes - Densetsu no Star Medal (J)(Eurasia) | |
| Koala Brothers (E)(Supplex) | |
| Koinu to Issho - Aijou Monogatari (J)(Trashman) | |
| Koinu to Issho 2 (J)(Caravan) | |
| Koinu-Chan no Hajimete no Osanpo - Koino no Kokoro Ikusei Game (J)(Rising Sun) | |
| Konami Collector's Series - Arcade Advanced (J)(Cezar) | |
| Konami Collector's Series - Arcade Advanced (U)(Mode7) | |
| Konami Collectors Series - Arcade Classics (E)(Patience) | |
| Konami Krazy Racers (E)(Cezar) | |
| Konami Krazy Racers (U)(Menace) | |
| Konami Wai Wai Racing Advance (J)(Capital) | |
| Konchu Monster - Battle Master (J)(Caravan) | |
| Konchu Monster - Battle Master Stadium (J)(Caravan) | |
| Konchu Ouja - Mushiking (J)(Caravan) | |
| Konchuu no Mori no Daibouken (J)(Caravan) | |
| Kong - King of Atlantis (E)(Independent) | |
| Kong - King of Atlantis (U)(Trashman) | |
| Kong - The 8th Wonder of the World (U)(Trashman) | |
| Kong - The Animated Series (E)(Menace) | |
| Kong - The Animated Series (U)(TrashMan) | |
| Konjiki no Gashbell - Unare Yuujou no Zakeru 2 (J)(Caravan) | |
| Konjiki no Gashbell (J)(Eurasia) | |
| Konjiki no Gashbell!! Makai no Bookmark (J)(Caravan) | |
| Konjiki no Gashbell!! The Card Battle for GBA (J)(Supplex) | |
| Konjiki no Gashbell!! Yuujou no Dengeki Dream Tag Tournament (J)(WRG) | |
| Koopa Troopa (SMK) | |
| Kootetsu Teikoku from Hot-B (J)(Eurasia) | |
| Koro Koro Puzzle Happy Panechu! (J)(Nobody) | |
| Korokke Great Toki no Boukensha (J)(Caravan) | |
| Korokke Yume no Bunker Survival (J)(Patience) | |
| Kotoba no Puzzle Mojipittan Advance (J)(Suxxors) | |
| Kunio kun Nekketsu Collection 1 (J)(WRG) | |
| Kunio Kun Nekketsu Collection 2 (J)(WRG) | |