Good Reputation
At the Press Start screen enter the following code to gain a good
reputation:
Y, Y, Z, X, X, Z, Y, Y, Y, X, X, X.
More Money
At the Press Start screen enter the following code to get some easy money:
Y, X, Z, Y, X, Z, X, X, Y, Z, X, Y.
Unlock Level Select
At the Press Start screen enter the following code to unlock Level Select,
if the code has been entered correctly a sound will confirm:
X, X, Z, Z, Y, Y, Z, X, Y, Y, X, Z.