Spider-Man 2: The Sinister Six (Torus Games/Activision, 2001)
It's mostly the same Spider-Man game as yesterday, but the music is much better and the animations are somewhat improved. They put objectives down on the ground so you can't abuse swinging to skip all the gameplay, and in general it's just a better game than the last one.
Spirou: The Robot Invasion (Planet Interactive/Ubisoft, 2000)
I was fully expecting this to be a weird misspelling of Spyro, but it appears to be a French comic book series. It has bad music and even worse animations, and the level design isn't interesting at all. The only positive I've got is that the comic book screen transition you can see in the screenshot is neat.
SpongeBob SquarePants: Legend of the Lost Spatula (Vicarious Visions/THQ, 2001)
Probably the worst of the SpongeBob games. It's ugly, the music is unremarkable, and it controls like crap. Most frustratingly, there's really no way to tell which fish are enemies and which aren't. The one in front of me there is hostile, but none of the others I saw were. How could you know that?
Spy vs. Spy (Kemco/Vatical Entertainment, 1999)
The spies are racing to collect three items and a briefcase, but when they lose a fight or get killed by one of the other spy's traps, all the items go back to random locations and they have to find them again. That's not very fun. It is notable for having a great tutorial as a handheld game in 1999, though.
Star Ocean: Blue Sphere (tri-Ace/Enix, 2001)
A sequel to Star Ocean: The Second Story that was received quite well in Japan and even remade a decade later, but never released anywhere else. It seems well-written from the small amount I played, and the music and graphics are also very well done. It's going on the list, but considering that the wiki describes it as being heavy on colloquialisms and sci-fi jargon, I may need to use a translation patch for it.
Star Wars: Yoda Stories (Torus Games/THQ, 1999)
This game is dire. It has so few frames of animation that it looks like one of those roguelikes where the whole screen just refreshes when you move, except that those crappy animations now also play when you don't move. The only positive thing you can say about it is that the music is good, but even that is only because they're using John Williams' movie scores. It's not even a particularly amazing adaptation of those tracks.
Star Wars Episode I: Obi-Wan's Adventures (HotGen/THQ, 2000)
A Star Wars action game that isn't very interested in Qui-Gon, I guess. It plays a bad remix of "Duel of the Fates" as its exploration theme and shifts to something else when you get into scripted combat, which seems backwards. The main flaw is obviously that it's as ugly as it is, though.
Star Wars Episode I: Racer (Pax Softonica/Nintendo, 1999)
I've been excited to get to this one since I first noticed it on my list, because the 3D release of this game is a great racer that still holds up 20 years after it first launched, but it seems impossible to adapt to GBC. And, it turns out, it is impossible to adapt to GBC. They went for a top-down 1v1 racing approach, and while that's probably about as good as you could get, 1v1 races just don't have the same feel and the overly responsive controls they went with take away any sense of control.
Street Fighter Alpha: Warriors' Dreams (Crawfish Interactive/Virgin Interactive, 1999)
I had high hopes for this as well, but its poor quality is much less surprising now that I see Capcom wasn't even the publisher on the EU release, which came out well before the NA and JP launches. It doesn't use the two buttons it has well, animations are too basic to be able to read at this resolution, and the music isn't even very good.
Stuart Little: The Journey Home (Tiertex/Activision, 2001)
One of my friends as a kid had this, so even though it's a Tiertex game and doesn't get past this screen, I know all that we're missing is a standard GBC platformer starring a mouse.
Super Black Bass: Real Fight (HOT B/Starfish, 1999)
Another GBC bass fishing game, which is a weirdly populated genre. This one is marginally less boring because you can see the lure's perspective instead of just watching the water.
Super Bombliss DX (TOSE/Bullet Proof Software, 1999)
Tetris with bombs. When you get two full rows, you set off all the bombs and they additionally clear anything that's near them, I think? It's not entirely clear.
Super Breakout (Morning Star Multimedia/Majesco, 1998)
I added a few extra games today just to be sure I remembered to share that this is the smallest GBC game ever made, weighing in at all of 21 KB. For perspective, that makes it 135 times smaller than Love Hina Pocket, the largest GBC game. There's nothing else interesting about this.
Super Chinese Fighter EX (Culture Brain, 1999)
A 2D fighter with clear similarities to other Culture Brain fighters like Power Quest, which made the list. It's cool that this one lets you add items for customization, but a small cast and complete lack of a story mode is enough to keep it from also joining the list.
Golf Ou: The King of Golf
John Romero's Daikatana
Kakurenbou Battle Monster Tactics
Keitai Denju Telefang
The Legend of Zelda: Link's Awakening DX
The Legend of Zelda: Oracle of Ages
The Legend of Zelda: Oracle of Seasons
LEGO Island 2: The Brickster's Revenge
Metal Gear Solid
Millennium Winter Sports
Pokemon Crystal Version
Pokemon Card GB2 - GR Dan Sanjou!
Pokemon Puzzle Challenge
Pokemon Trading Card Game
Quest for Camelot
Return of the Ninja
Scooby Doo! Classic Creep Capers
SD Hiryuu no Ken EX
Shin Megami Tensei Devil Children: Aka no Shou
Space-Net: Cosmo Blue
Star Ocean: Blue Sphere