What to know
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The Red Brick is the Artist modifier, linked to the Flugelheim Museum mission.
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You must switch to Catwoman and use her cat‑form ability to enter a hidden alcove.
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The alcove hangs off the left‑hand side of the main gallery area, just above the main path.
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Once inside in cat form, you can immediately collect the brick and then switch back to Catwoman to register it in the menu.
The Artist Red Brick in The Party Man mission of Lego Batman Legacy of the Dark Knight is tucked into a small side‑room above the main gallery floor at Flugelheim Museum, and reaching it hinges on using Catwoman’s cat form to slip through a narrow opening.
Artist Red Brick details
Where Flugelheim and The Party Man take place
The Party Man mission stages Joker’s art‑gallery shenanigans inside Flugelheim Museum, a high‑end Gotham institution crammed with sculptures, tapestries, and security systems.

The required Artist Red Brick is not in the main boss‑fight arena but in a small, easy‑to‑miss side‑room that branches off the primary gallery path. This makes the museum layout feel busier than it first appears, because you are expected to backtrack and explore above‑floor routes rather than just follow the linear fight path.
Step by step guide to reaching the Artist Red Brick
On the floor of the gallery, find the spilled purple paint.

Switch to Batman to use the UV Vision.

Follow the trail.

At the end, Inspect the frame.

You’ll get a key card.

Go back and Insert the key card.

Go through the new open door.

With Catwoman, find the little vent opening.

Summon your pet and go through the vents.

Once you’re out, press the red button.

Then climb the crates.

Run around the wall and to another vent.

Once you come out of these vents, you’ll see the Red Brick in front of you.

Simply claim it to get the Artist modifier.

Rewards and uses of the Artist Red Brick
Locating the Artist Red Brick in The Party Man mission is less about combat and more about disciplined exploration of the upper gallery paths at Flugelheim. By pairing Catwoman with her cat form and looping back to the left‑side alcove before you trigger the final wave of enemies, you can permanently lock the Artist modifier in one clean run. For completionists, this approach also streamlines the process of collecting other Flugelheim trophies and Batcave items, since you will already be familiar with every accessible ring and side‑room in the museum layout.