NiGHTS: Journey of Dreams Secrets and Unlockables (Wii)

Nights: Journey of Dreams (or, put properly, NiGHTS: Journey of Dreams) is a video game for the Wii console. It is a sequel to the 1996 Sega Saturn title Nights into Dreams.... Sonic Team USA developed the game, with Takashi Iizuka, one of the designers of the original, as producer, director, and lead game designer. Like the original, the game is set in the dream world of Nightopia, which is under threat from nightmare beings called Nightmaren, and the gameplay is based around the flight of a jester named NiGHTS.

William Taylor and Helen Cartwright are the names of two of the new children. William is an aspiring football player, and Helen is studying to be a violinist. They're both from a town called Bellbridge, which resembles London, with a giant clock tower and bridge. Will and Helen's stories are unique to both of them, and they do not interact. Where Nights into Dreams... was about conquering one's fears, Nights: Journey of Dreams is about the importance of family. (Wikipedia)

Unlockables

Different Endings & Events
To unlock each Secret Ending all grades must be above a C.

Note: The final cutscenes will all change after going to fight Wizeman a 2nd time with all C's.

Final Ideya - Complete all levels with a C or above with either Will or Helen, go to fight Wizeman a 2nd time to obtain.

Helen Secret Ending - Complete all of Helen's levels with a C or above, go back and fight Wizeman again to view.

Reala 2nd battle - Complete all of either Will of Helen's levels with a C or above, go back to fight

Wizeman, battle will take place before Wizeman's battle.

Will Secret Ending - Complete all of Will's levels with a C or above, go back and fight Wizeman again to view.

Ending unlockables
Finish the game under certain conditions to unlock these items. They will be available on the Story Select menu.

Audio Room - Finish Will's story

Helen's Video Room - Finish Helen's story with a least a C rating on all missions

Sketchbook - Finish Helen's story

Will's Video Room - Finish Will's story with a least a C rating on all missions

Original NiGHTS Soundtrack
Get an "A" rank on every mission to unlock the soundtrack to the orginal NiGHTS game. Dream Gate will also be snowing and have different background music.

Play as original NiGHTS into Dreams characters

Must have all 60 dream drops to obtain.

Claris Sinclair - Obtain all 60 dream drops and jump into the fountain in the dream world with Helen.

Elliot Edwards - Obtain all 60 dream drops and jump into the fountain in the dream world with Will.

Secrets

Hear Christmas music in My Dream on Christmas Eve
On Christmas Eve if you go to My Dream, you will hear the Jingle Bells song from Christmas NIGHTS playing in the background.

Here's a trailer of the game: