How do you save your co-op data for the lord of the rings The Return of the King on gamecube?

To save your co-op data in "The Lord of the Rings: The Return of the King" on GameCube, you need to complete a level and reach the save point at the end. The game automatically saves your progress once you finish a chapter. Additionally, you can use a GameCube Memory Card to store your save files, which allows you to continue your progress in future gaming sessions. Make sure to check that your memory card has enough space for the saves.