The goons in the area will start dancing. If you are quick enough, you can get approximately 2 million studs per minute using this trick with the x2 stud multiplier. Use a vehicle with a stud collector to defeat all enemies.
Go to the main area inside Arkham Asylum in DC Comics World. Next, go back to Vorton World to buy it at the unlock portal for 1 million studs. Run into it to get the Dwarf's Bounty x2 stud multiplier. Then, chase the blue Lego drone with the green shield around it, near the Batmobile, that is carrying the Red Brick. Once you spawn, go down the stairs, turn left, and get in the Batmobile.
Go to The Lord Of The Rings World from Vorton World. Rare Artifact Detector (detects mini-kits) Then, enter one of the following codes to activate the corresponding cheat function: Pause the game, select the 'Extras' option, and choose the 'Input Code' selection.
