Press Start to pause game play to display the "Fortress of Solitude" menu.
Enter one of the following codes at this menu to activate the
corresponding cheat function. A sound will confirm correct code entry.
Press Up(2), Down(2), Left, Right, Left, Right, Y, X.
Press Left, Y, Right, X, Down, Y, Up, Down, X, Y, X.
Press Left, Up, Right, Down, Y, X, Y, Up, Right, X.
Unlimited city health:
Press Y, Right, Y, Right, Up, Left, Right, Y.
Bizarro in Free Roam mode:
Press Up, Right, Down, Right, Up, Left, Down, Right, Up. Fly to the marker
at the top of the GNN building to change to Bizarro. To change back to
Superman, go to the marker at the other end of Metropolis.