Press Left, Up, Left(2), A, B at the main menu to display a cheat menu with level select, single hit kill, and all weapons options.

Note: This code requires a six-button controller. Hold Up + X + B + A + C at the character selection screen. The Riddler will be controllable in training mode.

Pause game play and press Up, Down, Left, Right, Up(2), Down(2), Left. The sound of an explosion will confirm correct code entry.

Homing Batarangs:
Press Down, Toward, B.

Bat Cuffs:
Press Toward(2), C.

Rocket Boots:
Press Toward, C, Toward, B, Toward, C.

Holographic Decoy:
Hold Down and repeatedly tap A.