Due to a bug in the game, Power Course 5 will not unlock. This cheat code will only unlock every song and PC 5. Dancers and Challenges will not be unlocked/completed.

This is a unique code, so read closely. What you're going to do is read down the following list:

BASIC EDITION
EDIT MODE
JUKEBOX MODE
PARTY MODE
RECORDS
WORKOUT MODE

After WORKOUT MODE, head to GAME MODE and choose it.

These are options in the Main Menu (a.k.a. Master Edition main menu). What you must do is SCROLL (not choose!) to those options in that order. When you scroll to that option, leave your highlighted cursor on them for at least 1 second before moving on to the next option. Basically:

-Move cursor to BASIC EDITION
-Keep cursor on BASIC EDITION for more than 1 second
-Move cursor to EDIT MODE
-Keep cursor on EDIT MODE for more than 1 second
-Etc.

As you move to the next option, do not keep the cursor on any other option for more than 0.5 seconds or the cheat will fail.

After you've chosen GAME MODE, you will not get a confirmation of sorts. An easy way to see if you've done the cheat right is back out to the Main Menu and enter Power Mode. If Power Course 5 is there, you've done the cheat right. All that remains is beating Challenge Mode and Quest Mode (for the dancers).

Thank you so much for giving us this information because I was really confused when the game said I unlocked it and then it wouldn't show up in the Power Mode. But now it's there and I'm happy.

I can't find power mode anywhere...

Party Mode. Choose it from the Main Menu, it's one of those choices there.