Get Full Stats :
Go to character select screen press square hold L1, L2, R1, R2 then press circle 5 times, X, Triangle, Square.

Unlock Running Man Cheat :
At the Options Menu, hold L1 + L2 + R1 + R2 and press Square, Triangle, Circle, Cross, Square, Triangle, Circle, Cross.

View All Hints :
At the Options Menu, hold L1 + L2 + R1 + R2 and press Circle, Cross, Circle, Cross, Circle, Cross, Circle, Cross.

Unlock All :
At the Options Menu, hold L1 + L2 + R1 + R2 and press Down, Left, Up, Right, Cross, Circle, Triangle, Square.
[Submitted by: K.Sterles]

Secret Courses :
Greendome and Floodhouse, simply get a trick score of 300,000+ on Tokyo Megaplex.
[Submitted by: WAKO_BILL]

Extras :
Mercury City Meltdown course :
Win a medal on the Elysium Alps course.

Mesablanca Course :
Win a medal on the Mercury City Meltdown course.

Tokyo Megaplex Course :
Win a medal on the Mesablanca course.

Aloha Ice Jam Course :
Win a medal on the Tokyo Megaplex course.

Pipedream Course :
Win a medal on the Tokyo Megaplex course.

Untracked Course :
Win a medal on the Aloha Ice Jam course.

Play as Jurgen :
Win a gold medal in any mode.

Play as JP :
Win two gold medals in any mode.

Play as Zoe :
Win three gold medals in any mode.

Play as Hiro :
Win four gold medals in any mode.

Alternate Costumes :
The Third costume Finish all green circle tricks.
The Fourth costume Finish all blue square tricks.

More Boards :
The Third board Earn the rookie rank
The Fourth board Earn the sensei rank
The Fifth board Earn the contender rank
The Sixth board Earn the natural rank
The Seventh board Earn the star rank
The Eighth board Earn the veteran rank
The Ninth board Earn the champ rank
The Tenth board Earn the superstar rank
The Eleventh board Earn the master rank

Hint: Elysium Alps loop :
On the Elysium Alps stage, press Select just into the Ice loop to come out at same speed on the other side.

Hint: Finding secrets :
Bust through the blue SSX glass pieces to find various secrets.