All Working Dance Dance Revolution SuperNOVA Cheats - Playstation 2

Unlock Boss Songs
Some of the boss songs can be unlocked in the shop by clearing the EX Showdown on "Nitro" and "The Last" stages in Stellar Master Mode:

Fascination Maxx - Complete "The Last" EX Showdown
Max 300 Super Max-Me-Mix, Chaos, Healing-D-Vision - Complete "Nitro" EX Showdown

Extra Stage Boss Songs in Normal Play
In order to unlock the "Boss Songs" used in Extra Stage, first, you must be in Game Mode. On your last stage, you must clear a song on Expert with a AA grade or higher. This will allow you to play the Extra Stage. You can pick any song you wish, but the mods are locked at 1.5x Speed, Reverse Scroll, and Rainbow arrows. A boss song also appears, listed in red, but will be different depending on which song sort you selected (before you start your game). In order to unlock the song in red for normal play, you must clear it with an A or higher, and then buy it from the game's shop:

Assuming you clear the Extra Stage with a AA grade or higher, you will gain access to the Encore Extra Stage. You can only choose one song, Chaos, and it will immediately end if you get anything other than a Perfect or Great. Clearing Chaos with a full combo allows you to purchase it in the shop as well.

Chaos - Clear the Encore Extra Stage with a full-combo
Fascination Eternal love mix - Clear it on Extra Stage on All Music Song Sort with an A or higher
Fascination MaxX - Clear it on Extra Stage on Hard Song Sort with an A or higher
Healing-D-Vision - Clear it on Extra Stage on Medium Song Sort with an A or higher
MAX 300 (Super-Max-Me Mix) - Clear it on Extra Stage on Easy Song Sort with an A or higher