The disc contains a playable Resident Evil 4 demo and trailers for all the GameCube games. It came with a Nintendo health and safety precautions booklet.
It was given out to people who pre-ordered the game, and because of large unclaimed stock, to anyone who asked. This is the exact same disc which was sent out to people who inserted the code from the Pure Evil pack online, only in different packaging.
4. Precautions booklet