At the "Press Start" screen, press Y, X, Z, Y, X, Z, X, X, Y, Z, X, Y.

Unlock Better Reputation

At the "Press Start" screen, press Y, Y, Z, X, X, Z, Y (3x), X (3x).

Unlock Level Select

At the "Press Start" screen, press X, X, Z, Z, Y, Y, Z, X, Y, Y, X, Z.