Go to Museum -> Collection -> Password and enter the desired password to unlock the CollectaCard. Each password can be used only once and they are case sensitive. If you already have the card unlocked, entering the password will add one level to the card's level.

These songs are unlocked in the Encore section of the Challenge series. Each song requires a certain amount of Rhythmia and has all 3 difficulties available.

These songs are unlocked for the Chaos section of the Challenge series. Each track has its own special difficulty score and are unlocked by gathering Rhythmia.

These characters are unlocked by gathering 8 crystal fragments of a specific color.

To unlock one of the series on Expert difficulty, you must first clear the three songs from that series in the Challenge section on Expert difficulty. To unlock the series on Ultimate difficulty, you must clear the three songs from that series in the Challenge section on Ultimate difficulty.

To view the staff credits at any time, collect 10000 rhythmia and beat Chaos to view the credits once. After that, you can view the credits at any time by tapping the settings button on the main menu and then tap the staff credits button at the bottom of the screen.