Let's Play Every Game Boy Color Game, Part 31
Ketto Transformers Beast Wars: Beast Senshi Saikyo Ketteisen (Transformer Production Company/Takara, 1999)
Robot fighting game, including a purple cheetah for some reason. The input lag is pretty bad.
Kidou Senkan Nadesico: Ruri Ruri Mahjong (Studio Saizensen/King Records, 1999)
Mahjong game with a huge amount of plot. Something about going around a spaceship and collecting stars by beating the crew members - who are all girls because this is anime - in mahjong. It's surprisingly difficult to find anyone who will play you at the start of the game.
Kindaichi Shounen no Jikenbo: 10nenme no Shoutaijou (Aspect/Banpresto, 2000)
A VN with great character models and fonts, but terrible backgrounds. I mashed through a lot of it before realizing it was a VN and there'd never be anything else, so unfortunately I don't really know what it's about. The characters travel to some kind of school and a creepy guy with silver hair shows up.
Kinniku Banzuke GB: Chousensha wa Kimida! (KCE Sapporo/Konami, 1999)
Basically a Ninja Warrior game. I love this idea, but the execution is off. You can't find out what you need to do on an obstacle until you're already on it, at which point you almost immediately fall off because you weren't already mashing b, spinning the dpad, or whatever else it wanted you to do. You'd have to just memorize the requirements for each obstacle, and unfortunately there's quite a lot of down time between attempted runs.
Kinniku Banzuke GB2: Mezase! Muscle Champion (Konami, 2000)
Same idea, but with an entirely new course and less downtime between runs. Unfortunately, it also introduces a really strange mechanic where your movement seems to change arbitrarily between obstacles. It's just the dpad until this fence, but then after that you need to mash A and B to run.
Kinniku Banzuke GB3: Shinseiki Survival Retsuden! (Konami, 2001)
And then we have the third game, which opens by bringing back the original course with much shinier graphics. Unfortunately, it also brings back all the downtime and doesn't fix any of the communication issues. I have to imagine these games came with manuals that they were assuming you'd have read before trying the course.
Kirby Tilt 'n' Tumble (HAL Laboratory/Nintendo, 2001)
The only GBC Kirby game was this early version of Yoshi Topsy-Turvy. Unfortunately, I don't have a way to use the tilt sensor, so this green screen will have to do for an image.
Kirikou (Planet Interactive/Wanadoo Edition, 2001)
Based on a French movie that was in turn based on West African folk tales about a boy who saves his village from a sorceress. The movie never came out in the US because of controversy around character sexualization and stereotypes, which is presumably related to Kirikou here looking naked. The game itself plays well enough, but it's not really my genre.
Kisekae Series 2: Oshare Nikki (Victor Interactive Studios, 2001)
Slice of life game where you, as almost always, play as a Japanese schoolgirl. It certainly looked like it was going to be an otome, but the parts that I played were just a very quick loop of going to school, picking an after school activity that didn't seem to do anything, and then repeating. I usually like this kind of game, but the music is way too in your face for what it is, and it gets grating quickly.
Kisekae Series 3: Kisekae Hamster (Kouyousha/Victor Interactive Studios, 2001)
Naturally, the sequel was another hamster minigame collection. I didn't get to see much of it because I accidentally agreed to listen to a long tutorial and then ran out of time, but here's a screenshot of all the things you can do. "Tsuushin" was romanized without the 's', for some reason, and there's a board game. Exciting stuff.
Golf Ou: The King of Golf
John Romero's Daikatana
Kakurenbou Battle Monster Tactics
Keitai Denju Telefang