Skate

All characters:
At the main menu, press L1, L2, R1, R2, Down(2), Square, Triangle
to unlock all characters in Free Play and Party Play mode. If you
entered the code correctly, a message will appear.

Best Buy clothes:
At the main menu, press Up, Down, Left, Right, Square, R1, Triangle, L1
to unlock all Best Buy clothes.

Avoid crashing from falls:
Use the following trick to avoid crashing when you are falling from
extreme heights. Just before you are about to land, hold L2 + R2 to
land instead of crashing.

Best Buy clothing:
Press Up, Down, Left, Right, Square, R1, Triangle, L1 at the main menu.

Christ Air:
Do a Backwards Grab then press Circle.

Coffin:
Do a Double Grab then press Circle.

Dem Bones:
You can unlock a hidden character called Dem Bones by breaking each bone
in your current character's body three times. Check the injury log to
peek at your progress.

Frontflip:
Grab and move the Left Analog-stick Down or Up.

Rocket Air:
Hold L2 + R2 + Right Analog-stick Down.

 