Flipper and Lopoka (Planet Interactive/Ubisoft, 2001)
Despite the English title, it's only in French. It's a character platformer that looks like it'd be one of the Disney games. There's not really anything interesting other than that your character does a long jump everywhere and you can stand on tornadoes for some reason.
Force 21 (The Code Monkeys/Red Storm Entertainment, 2000)
A game which suggested the invention of SDI systems by 2015 would bring back conventional warfare by making nukes unusable. Then China would invade Kazakhstan for resources and start WWIII. It's a unique scenario, at least, and that's fitting since the idea of an RTS where you can play as the US or China on GBC is itself pretty unique. It's not good, though. The GBC does not have enough buttons to be an RTS platform.
Formula One 2000 (Tarantula Studios/Take 2 Interactive, 2000)
An F1 game that was exclusive to the US for once. It's more or less like all the others except that it makes you do manual gear changes, which means there's an argument that the US version is a more serious sim than the European ones. Don't see that very often.
Frogger (Morning Star Multimedia/Majesco, 1997)
I guess color was such a fascinating idea in 1997 that you could get away with releasing Frogger again.
Frogger 2 (Game Titan/Hasbro Interactive, 2000)
Still Frogger, but now with better graphics, levels that just require one Frog to reach the end, and significant variation in level patterns and enemies. It's actually fun.
From TV Animation One Piece: Yume no Luffy Kaizokudan Tanjou! (Alpha Unit/Banpresto, 2001)
One Piece turn based RPG. I do not care about the source material, so I wasn't paying much attention.
From TV Animation One Piece: Maboroshi no Grand Line Bouken! (Alpha Unit/Banpresto, 2002)
One Piece strategy RPG. Again, I wasn't paying much attention. It plays a sound when you bump into something on the overworld, and if you hold in that direction the sound overlaps itself in a horrible way. That's fun.
Front Row (KID, 1999)
Japan exclusive racing game that did not get the F1 license and is entirely in English, oddly. It's an arcade racer rather than a sim, and it could use either a track map or turn warnings, but other than that I enjoyed this one the most of all the many F1 games. This style of top down racing just works better than third person at GBC resolution.
Fushigi no Dungeon: Fuurai no Shiren GB2: Sabaku no Majou (ChunSoft: 2001)
Mystery Dungeon: Shiren The Wanderer GB2: Majou Desert has two colons in it. Don't see that very often. It's a roguelike that opens with several levels of trying to get through a maze with a conga line of knights following right behind you. That's a neat idea except that staying ahead of them requires diagonal movement when available, and that's not reliable on a dpad. This really becomes a problem on the third floor, when the first enemy is a Red Knight who is much stronger than you and who you can't run away from. You just get sent back to start instead of getting a game over, but it's still crappy design.