NiGHTS into Dreams... Hints & Cheats

At the title screen, press Left, Right, Square, Circle, X, Triangle, R1, R2, Down, Up, L1, then L2. If done correctly, a message will appear telling you everything's unlocked, but you can't acquire trophies or upload your highscore.

To unlock Christmas NiGHTS, simply complete all 8 dreams with a "C" rank or better.

If you complete Christmas NiGHTS as both Elliot and Claris, you will unlock the option to view the Nightopian Collection on the main menu. This will show the Nightopians, Mepians, Nightopian/Mepian eggs in each level, as well as the mood of the Nightopians and Mepians in that level (the music alters based on how happy or sad they are).

There are 9 Bronze Trophies, 3 Silver Trophies, and 1 Gold Trophy.