Batman: Arkham Asylum reference
When you fight the Prototype LexBot near the end of Level 9, the robot runs into the walls and can be hurt just like Bane and the Titan Thugs in Batman: Arkham Asylum.
Red Brick and Character Codes
Pause the game to bring up the menu, select "Enter Code" and... enter code! Codes can be entered at any time, and are made available immediately. Remember that you only have to enter the codes once per save slot, but you have to re-enable them if you quit/restart.
Red Brick Minikit finder
In Gotham Park near the park, play the mini-game with the boats. Shoot the subs with your boat to unlock the Red Brick Minikit finder. You can purchase it for 50,000 Studs.
Red Brick X2
Find the Remote Bat Computer near the police station. Turn left, and you will see a mini-game. Play the game, and smash the cars with your hammer car to unlock the Red Brick X2.
Batman: Arkham Asylum referenc...