NiGHTS Into Dreams

Master code:
Quickly press Left, Right, Square, Circle, X, Triangle, R1, R2, Down, Up, L1, L2 at the title screen. The sound of a jingle will confirm correct code entry.

Bonus levels:
Earn a "C" or better rank in a level to unlock a bonus level.

Nightopian status:
Pause game play, then hold L1 + R1 and press Triangle.

Play as Reala in Spring Valley Remake:
Set the system date to April 1st.

Twin Seeds Final Level:
Earn an "A" rank for all Dreams.
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Xmas Nights:
Successfully complete the game with all "A" ranks with both characters.

Xmas Nights Gallery, Nightopian Viewer and Tracksuits:
Successfully complete Xmas Nights as both characters.