Quieker (German for "Squeaker") appeared in the Sesamstrasse episode 2169.

He came to Sesamstrasse to find someone to play with, but was being rejected by Rumpel with the sole reason that he is pink. He then played tug a rope with Pferd before jumping in a bathtub filled with mud. It turned out that Wolle and Pferd had no interest in playing in the mud, though it turned out that Rumpel could easily look past the pink color when it came to a chance to play in some high quality mud.