
Ninja Rats with the Turtle Master in the Sewers of Peblak
The Sewers of Peblak appear in the 2003 cartoon episode Turtles in Space - Part 1: The Fugitoid. Living in them are the Ninja Rats and the Turtle Master.
The Ninja Turtles and Professor Honeycutt encounter them when escpaing through the city's sewer system from the Federation.