Invincibility
While playing the game on land, press A, Y, X(2), Y(2), B, Y, X, A.

Additional 100,000 gold
While playing the game on land, press A, X, Y, B, Y, B, X, B(2), A.

50 skill points
While playing the game on land, press A, B, Y, X, Y, B(2), Y, B, A.

Neutral reputation
While playing the game on land, press A ,X, Y, X, Y, B(2), Y, B, A.