Pweek

Pweek is one of Tweek's brothers found in the Quackenheim Museum.

How to Rescue
In the middle of the basement he can be found near the Fire Exit door. The boiler will need to be fixed first, which can be done by flipping the switches in order after talking to the Boiler Room Guard. The first will appear on the first floor, second on the bottom, third on the top, fourth on the bottom.