Various cheats
  
Unlock Cheat Gnome:
     Press Circle, L1, L2, R2, R1.

Max Physical Skill:
     Press L1, R1, Down, X, L3.

Max Mental Skill:
     Press L1, R1, X, Circle, Up.

Max Artistic Skill:
     Press L3, R3, R1, R2, Circle.

Acquire Skill:
     Press L1, R2, Right, Square, L3.

Power Social:
     Press Triangle, R2, L1, X, Square.

Team Photo:
     Press Up, Down, Circle, Up, Down at the Credits screen.