Free movement: 
Move Casper to the upper left corner of any game location. 
Hold Up/Left + L1 + R1 + Start to pause the game. Release 
Up/Left + L1, and press Down/Right + Triangle while 
continuing to hold R1+ Start. The game will resume in free 
movement mode. Press R1, then use the D-pad to fly over 
any wall. Press L1 to resume normal game play.