When you are in the Batcave, switch to Robin and turn into the Technology suit. Now, you have to have the Decoy suit upgrade for him. Press circle and a decoy will pop up. Press triangle to turn into the decoy. Jump off the edge then do not move then you will explode, come back to life and there will be two robin and one batman. Continue as long as desired. You can have all of robins forms at one time.
I have two ways to get a lot of studs.#1: Play the level where you have to destroy Penguin's submarine. Play as Mr. Freeze's Iceberg, and if you have times studs 2, 4, 6, 8, 10 or all of them, make sure you turn them on. When you play as Mr. Freeze's Iceberg, try and find those small penguin subs that lay those mines in the water. When you find them, unload a lot of ice rapidly, and you will see studs pouring into your inventory. You can do this for an unlimited amount of time. #2:This one is an easy one to do, and it is also fun. Go to Arkham Asylum for the Criminally Insane and play as Mr. Freeze. Go to the Villain Trophy Room(aka, the cafeteria room), and you should see a bunch of clowns. Now just start freezing them until they die, and they should shoot out studs. Hope I helped out on the studs proplem! P.s. Please rate me!!!!!!!!!!!!
These two characters are unlocked when you beat the game with the corresponding task completed.
Unlock Hush: Rescue ALL 25 civilians in the game. To find out which levels you still need to rescue a civilian look for the small face with either a happy or sad face indicating whether or not you still need to rescue them.
Unlock Ras Al Ghul: This villain whose name means 'The Demon's Head' is unlocked when you have collected ALL 300 of the mini kits. There are 10 in each of the 30 levels.
To unlock Arkham (psychiatric hospital for the criminally insane) you must achieve 'True Villain' status on ALL levels in the Villain storyline by collecting enough studs to max out your stud counter on each level. To access the villains and the level go to the right of the Batcomputer and down the ramp and pull the lever. Then go through the door on the right to reach the Memorabilia room where you then climb the ladder at the top.
To unlock Wayne Manor you must achieve 'Super-Hero' status on each of the Hero missions or alternatively achieve 'Super-Villain' status on each Villain mission. To reach these statuses you have to collect enough studs to max out your stud counter on each level. To access the mission go to where the vehicles are in the Batcave and then go to the far right and down to the bottom. Step on the elevator which will take you to the Memorabilia room and the Wayne Manor mission is in the upper left corner.