Okay, by popular request, here is a list of the games that were released exclusively for the Nintendo Gamecube.

There are 397 releases for the Gamecube, 121 of which are exclusives (in one way or another.)

That's 31.93%.

Please note, that this "exclusivity" is only with respect to the PS2 or XBOX.
Some of these games may have GBA or Nokia N-Gage releases (and they do), but as I was only considering console formatted games, I believe that this list is very accurate.

I've spent a LOT of time over the last three days making sure that this is as close to 100% as possible, but I can certainly make mistakes.

If anyone isn't sure if a title is exclusive, or can show that the title exists for PS2 or XBOX, please let me know.

Finally, I'll be adding a "Gamecube Exclusive" tag to the item description for the Gamecube section of the DP Online Rarity Guide.

Enjoy!

Steve

Games exclusively for Nintendo Gamecube (there are a couple of notations):

1080° Avalanche
1080° Avalanche w/Bonus DVD
Amazing Island
Animal Crossing
Army Men Air Combat: The Elite Missions
Backyard Football
Batman: Rise of Sin Tzu - Limited Edition Lithograph Commemorative Edition
(NOTE: This game is available on PS2 & XBOX, as is the Limited Edition packaging. However, the other two formats are packaged with an action figure, rather than the lithograph.)

Beach Spikers: Virtua Beach Volleyball
Beyblade: Super Tournament Battle
Big Air Freestyle
Billy Hatcher and the Giant Egg
Bloody Roar: Primal Fury
Bomberman Generation
Bomberman Jetters
Bust-a-Move 3000
Charlie's Angels (NOTE: This game was released on PS2 in PAL format in Europe and Australia)

City Racer
Cubivore
Custom Robo
Darkened Skye
Die Hard: Vendetta (NOTE: This game was released on PS2 in PAL format in Europe and Australia)

Disney Sports Basketball
Disney Sports Football
Disney Sports Skateboarding
Disney Sports Soccer
Disney's Hide & Sneak
Disney's Magical Mirror Starring Mickey Mouse
Disney's Party
Disney/Pixar's Monsters, Inc.: Scream Arena
Eternal Darkness: Sanity's Requiem
Evolution Worlds
F-Zero GX
Final Fantasy: Crystal Chronicles
Go! Go! Hypergrind
Gotcha Force
Harvest Moon: A Wonderful Life
Home Run King
Ikaruga
Kirby Air Ride
Knockout Kings 2003
Legend of Zelda, The: Collector's Edition
Legend of Zelda, The: Four Swords Adventures
Legend of Zelda, The: Ocarina of Time/Master Quest
Legend of Zelda, The: The Wind Waker
Lost Kingdoms
Lost Kingdoms II
Luigi's Mansion
Mario Golf: Toadstool Tour (Target Bullseye Edition)
Mario Kart: Double Dash!!
Mario Kart: Double Dash!! w/Bonus Disc
Mario Party 4
Mario Party 5
Medabots Infinity
Mega Man Network Transmission
Metal Gear Solid: The Twin Snakes
Metroid Prime
Motor Trend: Lotus Challenge (NOTE: There is a game titled, “Motor Trend: Lotus Challenge” that was released for the XBOX. The covers are different, and they were released at different times. Without playing the two, I don’t know if they are, in fact, different games.)

Muppet Party Cruise, The
NBA Courtside 2002
Outlaw Golf/Darkened Skye (2-in-1)
P.N. 03 (Product Number 03)
Pac-Man VS.
Pac-Man VS./Pac-Man World 2
Phantasy Star Online Episode I & II PLUS
Phantasy Star Online Episode III: C.A.R.D. Revolution
Pikmin
Pikmin 2
Pokémon Box: Ruby & Sapphire
Pokémon Channel
Pokémon Colosseum
Pokémon Colosseum: Bonus Disc
Pro Rally 2002
Puyo Pop Fever
Rally Championship
Resident Evil Zero
Road Trip: Arcade Edition (NOTE: “Road Trip” was also released for the PS2. “Road Trip: Arcade Edition” is a slightly different game with different cover art.)

Shrek: Extra Large
Skies of Arcadia: Legends
Sonic Adventure 2: Battle
Sonic Adventure DX: Director's Cut
Sonic Mega Collection
Space Raiders
Spirits & Spells
Star Wars: Rogue Squadron II: Rogue Leader
Star Wars: Rogue Squadron III: Rebel Strike
Star Wars: Rogue Squadron III: Rebel Strike (w/Demo disc)
Star Wars: Rogue Squadron III: Rebel Strike Limited Edition Preview Disc (featuring Star Wars Original Arcade Game)
StarFox Adventures
Summoner: A Goddess Reborn
Super Mario Sunshine
Super Monkey Ball
Super Monkey Ball 2
Super Smash Bros. Melee
Swingerz Golf
Tales of Symphonia
Tom Clancy's Sum Of All Fears, The
Tonka Rescue Patrol
Transworld Surf: Next Wave, The
Tube Slider
Ultimate Muscle: Legends vs. New Generation
Universal Studios: Theme Parks Adventure
Virtua Striker 2002
Wario Ware, Inc.: Mega Party Game$
Wario World
Wave Race: Blue Storm
Worms Blast
WWE Day of Reckoning
WWE Wrestlemania X8
WWE Wrestlemania XIX
Yu-Gi-Oh!: Falsebound Kingdom
Zoids: Battle Legends
ZooCube

Total = 121/379 = 31.93%