Pop'n Music 9

Cheat mode:
Press the indicated buttons on the Pop'n Music controller at the title screen, where "1" is the button on the far left, and "9" is the button on the far right. The corresponding song will be unlocked in arcade mode for the current game session.

Secret AC songs:
Press 19999999991 at the title screen.

Secret CS songs:
Press 29999999992 at the title screen.

Secret ee'mall songs:
Press 12346987 at the title screen.

Secret Pop'n Music 10 preview songs:
Press 3692147 at the title screen.

Secret revival songs from previous Pop'n Music games:
Press 8794613 at the title screen.

Secret long versions:
Press 1234123446 at the title screen.

Secret remixes:
Press 777786 at the title screen.

Secret hyper/EX difficulties for songs:
Press 123464786 at the title screen. Play these difficulties in arcade mode and complete a song to unlock them in free mode.

All characters:
Press 123123123123 at the title screen.

All courses:
Press 6478664786 at the title screen.

Secret options:
Press 464646 at the title screen.

Completion bonuses:
Successfully complete challenge mode to unlock the "Extra Stage" or a picture in the Omake menu.
Alphonse Nichols.

Cup-Kun:
Get 1,800 points in the Pop 'n Cafe in free mode.
Alphonse Nichols.