Dancing Blade

Unlock Special Skate Park: The Dream House:
When you have opened the final skate area (Huntington) then place third or better in the competition to recieve a Dreamhouse in which wings of the Mansion can be unlocked by completing tasks from the courses (High Score, Hitting all of a certain object, ect). 

Unlock Every Single Level:
During play, pause the game and press Circle, Up, Down, Square, Triangle. All levels including the dreamhouse will now be unlocked 

Unlock Every Single Trick:
Press pause then press Down, Left, Up, Right, Down, Left, Up, Right. Then it should say "all tricks enabled". Also, it should say "dont hurt yourself".