The Turtle Master is the mentor of the Ninja Rats. He appear in the 2003 TV series episode "Turtles in Space, Part 1: The Fugitoid".
The Turtle Master lives in the sewers of planet D'Hoonnib. He is the direct counterpart to the Earth's Splinter; as Splinter the rat raised four turtles, the Turtle Master raises four rats.
Video Game Appearances
He made an appearance in the console/PC version of the video game Teenage Mutant Ninja Turtles 2: Battle Nexus. In the game's Battle Nexus Tournament mode, both he and Splinter watch their students fight each other, reminiscing on when they fought each other.