Objective 1: Face the Goons
Head to the back of the platform and be ready to listen to a tirade from The Joker. Once his rant is finished, the door on the left of The Joker opens and three LexBots emerge. Make quick work of them and the door to the right opens. This time, three goons rush out to attack. This is a good opportunity to complete the Combat Challenge for the level as well. After you’ve dispensed some justice, be ready for the real fight.
Combat Challenge: Finishers
At the start of the level, switch to Superman and fly. Hover at the bottom edge of the screen and locate the three Joker props for the level, targeting them with your heat vision as you come across each one. The first is in the lower left corner of the level, the second is on a platform in the center near a door with hyper strength handles, and the third is on the far right side of the area.
The Joker Smash Challenge: 3 / 3
Objective 2: Fight Lex and The Joker
Lex Luthor emerges from the center door and he means business. He quickly shifts to his Big LEGO form, making a direct attack impossible. To penetrate his force field, you have to shock him using the three electrified posts on the platform. You can choose to stand near one of them and quickly flee when he charges you, but you risk the shock hitting you as well. To prevent this, hover as Superman and use your heat vision to target the post when Lex wanders near it.
The shock tears down the force field and temporarily leaves Lex Luthor stunned. Use Superman and engage Lex Luthor with your heat vision. Shock him three times and he sits out the fight, letting The Joker run about like the madman he is. Some goons join the melee as well.
Stun The Joker and some LexBots appear on the scene. After you turn the metal menaces into scrap, more goons rise up from the central platform. Along with them there is a LEGO crate. Shatter the crate to reveal a Token that unlocks the Electricity Suit.
Unlocked: Electricity Suit
Once you defeat the goons, a third platform on the right rises up with some LexBots and LEGO bricks. Destroy the bots, then build the bricks into a device. This device needs to be charged, so equip Batman with his Electricity Suit and draw energy from the terminal in the lower left corner of the area.
Once you’ve drawn the terminal’s power, head back to the device and charge it. The charge results in a shockwave that affects the still stunned Lex Luthor, tearing down his force field once again. Quickly deal him a few fistfuls of justice to bring this fight to an end.