While you are in the Batcave go to the place where you can switch your costume (like the heat suit etc. ) Then where the computer is turn right. Prince Of Tennis Gba Rom. You should still be going. There is a place where you can go to Arkham Asylum (if unlocked. ) if it is not unlocked you have to finish all the missions in the batcave. Go to the place with the 2 doors.

Go to the second door. Go to the place where you can customize your own player.

When you are done test it. Then walk in the wall then come out of the place. If you put on a cape it will be gone, you also should see colorful dots all over your player also no cape! But if you go in the place where you customize, everything will come back. Bat-Tank KNTT4B Bruce Wayne's private jet LEA664 Catwoman's motorcycleHPL826 Garbage truck DUS483 Goon helicopter GCH328 Harbor helicopter CHP735 Harley Quinn's Hammer TruckRDT637 The Joker's van JUK657 Mad Hatter's Glider HS000W Mad Hatter's Steamboat M4DM4N Mr. Freeze's Iceberg ICYICE Mr. Freeze's Kart BCT229 Penguin Goon SubmarineBTN248 Police bike LJP234 Police boat PLC999 Police car KJL832 Police helicopter CWR732 Police van MAC788 Police watercraft VJD328 Riddler's jet HAHAHA Robin's submarine TTF453 Two-Face's armored truckEFE933.