Nintendo GameCube Preview Disc

Nintendo GameCube Preview Disc is the only known demo disc released for purchase by Nintendo for the Nintendo GameCube. It includes playable demos for five games: Billy Hatcher and the Giant Egg, Sonic Adventure DX: Director's Cut, Soulcalibur II, Tom Clancy's Splinter Cell, and Viewtiful Joe. It also includes several preview videos of GameCube games, and two bonus games that can be downloaded to a Game Boy Advance using the GBA cable.

Billy Hatcher and the Giant Egg Demo
Text ingame can randomly lose letters or add additional spaces. The start menu cutscene displays a black screen but plays audio perfect. If you pause ingame and hit End Game or finish the demo level, the start menu will have a large black square in the corner which goes away when you get ingame again.

Sonic Adventure DX: Director's Cut Demo
When entering a stage, there's a chance the UI will not render, making it impossible to see lives, rings, time limit, etc. This also breaks text and the stage clear screens when it occurs.