Batman Forever Cheats
Press Left, Up, Left(2), A, B, Y at the game start screen. Change the game type to normal mode and press Start. Choose a character and press Start to display the cheat mode screen. This screen allows stage selection, access to all weapons, and control of the Riddler in the practice mode.
Kill all enemies
Enable the "Cheat mode" code. Press Start + L + R during game play to kill all normal enemies. Press this sequence multiple times to kill the Boss characters.
"Unlucky ... baker's dozen"- Blast off the elevator's roof and use the grappling hook to reach the 13th floor. "Steel ... fall through the floor"- Use the grappling hook to yank down the hanging safe and open a secret room in Two-Face's hideout. "A musical ... rewards"- Knock an opponent into the electric cords on Claw Isle. "Looking ... found"- Save the hostages by raising your character up with the grappling hook.
Defeating Big Riddler
To defeat Big Riddler in the final level, you must hit him with contact hits. All other attacks do no damage. Use stick goo then jump kick him. Repeat this until he dies.