Hidden 10th Kingdom
From disc one's [Main Menu], select [Kingdoms]. You will see a map that lists 9 kingdoms and asks you to "Search for the Hidden 10th Kingdom". You move (Left) from the 1st kingdom to the 3rd, then you move [Up] to the 4th, then you move (Left) to reach the castle. Press (Enter). You have found the "Hidden 10th Kingdom", as you can see from the text screen that comes up. Once you've read the message, you can click [Up] one more time to highlight the [Magic Mirror]. Selecting it reveals a short clip showing two of the characters entering the 10th Kingdom.