Easy Money:
At the Press Start screen, press Y, X, Z, Y, X, Z, X, X, Y, Z, X, Y.

Level select:
At the Press Start screen, press X, X, Z, Z, Y, Y, Z, X, Y, Y, X, Z.

Good Reputation:
At the Press Start screen, press Y, Y, Z, X, X, Z, Y, Y, Y, X, X, X.

Thanks to Revolution reader Steve Martin!