The Mousers are robots created by Dr. Baxter Stockman and through this affiliation enemies of the Ninja Turtles. The robots are about knee high. They have a head with sharp teeth and two legs. Their jaws are strong enough to bite through steel.
Their origin is very similar to the comics: they first appear in the first episode Things Change as they tried to kill Splinter. He and the Turtles managed to destroy them, but at the cost of their lair, forcing them to find a new one. In the next episode, we learn that they were created by Baxter Stockman to control the rat problem. Donatello gathers the remains of one Mouser and fixes it, but upon being fixed it goes on a high speed chase and it eventually joins up with hundreds of them in the sewer. The Turtles engage in an all out brawl with the Mousers, discovering that they are more durable than the last batch as a shot from a shuriken barely damaged one. Eventually Leonardo discovers the only way to beat them is chop off their heads, and the Turtles managed to destroy all but one; Donatello tries to capture it to study, but Raphael destroys it before he can.
April O'Neil discovers Baxter is also using them to rob banks and jewelry shops; as a result, Baxter sent four Mousers to kill her, but she was rescued by the Turtles. April decides to work with the Turtles to destroy the Mousers. They make their way to the laboratory and encounter Stockman, who activates the Mousers. April and Donatello manage to shut down the Mousers and make them self-destruct, destroying them and putting Baxter Stockman out of business. Even worse, he is punished by The Shredder for failing him.
Mousers continued to make appearances throughout the rest of the series, including as aids to Stockman after he became a full-time member of Shredder's "staff." Later, Dr. Chaplin created a new variety of Mousers with four legs and the ability to transform into large spheres, which were deployed against the Turtles to retrieve a Triceraton anti-gravity generator from Hong Kong.
In the episode Head of State, Agent Bishop and Baxter Stockman create Organic Mousers to protect earth from aliens. Many years later Baxter used them to try to kill than President Bishop. The Organic Mousers perished in a cave-in at Stockman's lab. After Bishop saved his life he told Stockman that the Department of Agriculture was interested in his Mousers.
Description and abilities
Standard Mouser robots are of the approximate size and shape of a turkey. They have a single eye and two enormous, hardened steel toothed jaws that can bite through concrete, brick and steel with ease. In addition, the Mousers are able to use their gripping toes to climb walls, and have a hollow body cavity, with which they can transport swallowed material or objects.
Standard Mousers only have a low intelligence and no independent thinking skills; they are basically drones and usually controlled by a central computer station or simply a remote control.
- Mouser v2.0 (Teenage Mutant Ninja Turtles (2003 TV series), Teenage Mutant Ninja Turtles 3: Mutant Nightmare)
- "Bishop's Mouser" (Teenage Mutant Ninja Turtles 3: Mutant Nightmare)
- Organic Mouser/Bio Mouser (Teenage Mutant Ninja Turtles: Fast Forward)