Here are some cheats and tips for the game Batman: Revenge Of The Joker.
Level select:
Enter 5257 as a password. Six objects that resemble
mushrooms will appear along the bottom of the screen to confirm
correct code entry. Enter one of the following passwords to begin
game play at the corresponding level.
Level Password
1-1 1100
1-2 1200
Level 1 Boss 1300
2-1 2100
2-2 2200
3-1 3100
3-2 3200
Level 3 Boss 3300
4-1 4100
4-2 4200
Level 4 Boss 4300
5-1 5100
5-2 5200
6-1 6100
6-2 6200
Level 6 Boss 6300
7-1 7100
Final battle 7200