Looking for a 100% guide to Mission 9: Joker in LEGO Batman: Legacy of the Dark Knight? This walkthrough covers every step of The Big Dukeroo – from releasing all three parade balloons to locating every hidden collectible along the way. You’ll find all 5 Cakes, all 5 WayneTech Caches, the Red Brick: Showbiz, and the Skill Brick reward, all in order, so you won’t miss a thing.
Related Guides:
Mission 8: Flugelheim
Mission 10: Two-Face
LEGO Batman: Legacy of the Dark Knight Hub
All Collectibles in Mission 9: Joker
Apart from the yellow Skill Brick at the end of the mission, you can also find:
How to Replay a Mission
In case you didn’t find all collectibles in the first story playthrough, don’t worry. You can still get it. Play the story to Mission 6: Shreck’s Department Store, where you restore the Batcave.
Then, travel to the Batcave and interact with the computer at the top, next to the red batphone. Here you can select the mission you would like to play again.
You will also see the status. If the box is ticked: Congratulations, you’ve found all the collectibles in this mission. If not, there is still work to be done!
Batcave Trophy: Cakes
Find and destroy 5 Cakes in Mission 9: Joker to receive the Batcave Trophy: Cakes. Each adds up to the total of 170 Trophy Collectibles. Therefore, you will have 5 of 170 Trophy Collectibles after destroying all five Cakes.
Here’s where they are:
Red Brick: Showbiz
In Mission 9: Joker, the Red Brick is inside an apartment. Between Balloon 2 and 3, look up to find the apartment window that you can cut open. Inside, move the TV so Kitty can reach the Kitty Vent to get the Red Brick on the other side.
Wayne Tech Caches
Find and open 5 Wayne Tech Caches in Mission 9: Joker to receive a total of five WayneTech Chips.
Here’s where they are:
The Big Dukeroo – Mission 9: Joker Start
Starting the mission at the mission marker on the roof will start Mission 9: Joker.
Release the Balloons
There are three balloons you have to release now. Each of them have their own numbered mission marker.
First Balloon
It is right at the mission start location. The balloons are attached to a tall rectangular anchor point. First, use Catwoman’s Whip on the yellow screw, then switch to Batman to use the Bat Claw on the yellow grapple plug.
While Batman is pulling on the plug, switch to Catwoman and go to the front of the rectangular anchor. There is a Kitty vent. Summon a kitty, get inside, and pick up the control handle. Take it back to Catwoman.
Now, while Batman is still pulling the plug, Catwoman can climb up the side of the rectangular anchor point and release the balloon using the control handle.
WayneTech Cache 1 of 5
Next to balloon 1 is an alley with a climbable wall and a lever at the top (look for the line of golden studs). Switch to Catwoman to climb the wall and pull the lever. This will open the restaurant below with the WayneTech Cache visible inside the locked kitchen.
As Catwoman, summon a kitty and send it through the Kitty Vent to open the door from the other side. You can now open the WayneTech Cache.
WayneTech Cache 2 of 5
While taking care of the previous Cakes collectible, you might hear a Delivery Guy complaining about losing his WayneTech deliveries. Just below the previous Cake, there is a golden stud line and the Delivery Guy sitting there. Use UV Vision where he sits.
Follow the footprints into the alley, where you can move a palette to the right. This will open up the passage to the shed behind it, where the WayneTech Cache is.
Second Balloon
You will notice the pillars with Joker’s face on them. Switch to Catwoman and use the Whip to turn each element so all three faces are looking forward. This will collapse the pillar into a shorter one.
Do this with both pillars, and the center door will open, releasing two explosive Jack-in-the-Boxes. Enter the room to find the handle for the release mechanism at the top.
Grapple to the top, place the handle, and release the balloon.
Red Brick: Showbiz
Between the second and the third balloon. Look high up there is a shimmering window. Grapple up to one of the vantage points next to the window and balance on the rope to reach the window. Cut the glass with Catwoman.
Jump inside and move the TV a bit to the left. Not all the way. Then, summon the Kitty. Start on top of the coffee table, then jump onto the TV. From there onto the bookshelf to reach the Kitty Vent. You may have to adjust the TV’s position to reach the top of the bookshelf.
The Red Brick is on the other side of the Kitty Vent in the locked room. Jump up on the coffee table to get it. For Fun: There is an item in this room that Kitty can interact with!
Third Balloon
Go to the last balloon. After fighting the thugs, look for the spot where Batman can use X-Ray Vision. You will see how the machine is built. Follow it to the left side, where you will discover a wall where Batman can use the Explosive Spray.
Destroy the wall, and use Catwoman’s Whip to lower the gate. Inside is a safe she can crack.
Inside the safe is the handle for the balloon release mechanism. As soon as the safe is open, some more henchmen will attack. After the fight, climb the two side walls to reach the top and release the third balloon using the handle.
Find a Way to Reach Joker
Fight Joker’s thugs, then build a pump. Jump on it to inflate the Bat Balloon. Avoid Joker’s rockets and enjoy the mission’s ending.
Rewards
Completing Mission 9: Joker, grants:
-> 1 Skill Brick (Yellow Brick)
Suits Collectibles:
-> 1x Batman (Batman: The Brave and the Bold)
-> 1x Catwoman (Nine Lives)
Additional Collectibles:
-> Batcave Trophy: Cakes
-> Red Brick: Showbiz
-> 5x Wayne Tech Caches
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About LEGO Batman: Legacy of the Dark Knight
Release: May 22nd, 2026
Developer: TT Games
Publisher: Warner Bros. Games
Official Website: https://legobatmangame.com/

















































