Rot Lab
Starter building in Area 1, next to the Rot Center. New players pick up their starter brainrot and finish the tutorial here.
The tutorial also hands out a locked "illegal box" - a decorative placeholder with no active function yet.
The tutorial starter isn't competitive - keep it in storage rather than sell it, and build your early team from wild catches instead.
Details
Purpose
New players pick up their starter brainrot here and finish the tutorial.
The tutorial hands out a locked "illegal box" (decorative, no function yet); a scripted intro has an intruder steal your other two starter picks.
FAQ
Where do I get my starter brainrot in Catch A Brainrot?
At the Rot Lab, a building in Area 1.
What is the "illegal box" from the Rot Lab tutorial?
A locked, decorative inventory item from the tutorial with no active function yet. Not being able to open it is expected behavior, not a bug.
Should I keep or sell my starter brainrot?
Keep it in storage rather than sell it, but don't build your early team around it - most players stop using it within the first hour.
Other locations
Source-checked
Facts on this page are extracted from primary sources — official announcements, in-game UI and developer posts. Unconfirmed items are labeled. updated · GuideDex staff. Report a correction.