Lego Batman 2: DC Super Heroes Walkthrough Part 9 – Asylum Assignment, Part 1
Head over to the left and talk with Commissioner Gordon. He tells the duo that everyone is accounted for save the Joker. While Robin suspects explosives were involved, Batman thinks otherwise from some of the items he has seen. They step into an elevator to investigate matters further but it goes crashing down into the basement below.
Once everything has settled, turn your attention to destroying the nearby grey block items. They will break into pieces you can assemble into a suit changer for Robin. He will now be in the Hazard Suit. Use its water spout to put out the fire to your right.
Continue to the right and drop into the tank there. Head to the left and throw the switch at the pump station just next to the small elevator. It will raise up a suit changer for Batman. Switch to Batman and use the changer to get the Electricity Suit.
Head over to the right and up the staircase to the Electrified floor. Cross over to the right and to the generator that is just to the right of the stairs. Have Batman interact with it via “B/Circle” to power down the generator and clear the way for Robin in the Tank below.
Time for Robin to head over to the right underwater. Just a few panels from the former wall you will find some pieces stuck to the ground. Throw the Batarang at them a few time to get the wooden planks to float to the top, creating a path for Batman to take.
Jump across the wooden planks and the electrified bar. On the other side of the bar Batman can pull the charge out of another generator. This will shut down the big fans in the water below, allowing Robin to move forward.
As Robin, head through the path behind the now stationary fans. Follow it to the right and back into the fore area. Just to the right of the second fan is a switch that will open a plug for Batman. Switch back to Batman and go to it. Interact with it and Batman will cook a turkey for Croc in the next room. This gets him to pop out of the water and clears the way for Robin to head through below.
Switch to Robin and head over to the right through Croc's cell. Head to the front middle of it and pound away on the blue machine there. Once it is destroyed, it will stop the fan blades that are spinning above the surface, blocking Batman's Way. Continue as Robin over to the far right.
Switch back to Batman and smash through the fan. Head over to the right and smash apart the desk in the next room. Batman can reassemble it into a lever that will let Robin pass through into the next section automatically. The tricky part is getting it to do a full circle. Head over to the right to the next part of the room with a panel that has a Water symbol on it.
Switch back to Robin now and head over to the right. Stand on the pile of brinks that is in the middle of the next area and float up to the surface. Now, use the Hazard suit and spray water onto the Water symbol in the back of the room. Keep spraying the symbol until it is full. Once it is, a staircase will lower, clearing the way forward.