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Biographical information

Baxter Stockman's Laboratory, Technodrome, Stockgen, Stockman-Pod


Minefield Ordnance Unarming System Enhanced Robots (IDW), Mobile Offensive Underground Search Excavation and Retrieval Sentries (Nickelodeon)

Weapon(s) of choice

Metal Jaws


Stockman's minions


Baxter Stockman, Foot Clan

Physical description



2' 6"


46 lbs

Eye color


Out of universe information

Mirage, 1987 series, Archie, 2003 series, Dreamwave comics, Fast Forward, IDW, Video games, 2012 series


Mirage Studios, Archie Comics, Dreamwave, Konami, IDW Publishing, Activision

First appearance

Eastman and Laird's Teenage Mutant Ninja Turtles #2

Created by

Kevin Eastman
Peter Laird

Teachers and Students

The Mousers are robots created by Dr. Baxter Stockman and through this affiliation enemies of the 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.

Description and abilities

Standard Mouser robots are of the approximate size and shape of a turkey. 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 with their gripping toes able to climb walls, and have a 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 Variations

There are also various other models of Mousers, but these are mostly prototypes or test models.


The Mousers were first developed and designed by Baxter Stockman, ostensibly to combat the rat problem in New York. In reality, these robots were designed to enrich him by being used for criminal purposes.

When the Turtles and April O'Neil appeared on the scene, they rushed Stockman - and in the 1987 animated series the Shredder - the Mousers occasionally downright hordes on it. As combat units, however, Mousers are very limited especially by their dependence on a central control unit, which made ​​them vulnerable to appropriate sabotage tactics.

Mirage Comics

Mirage mouser
Kung fu frogzAdded by Kung fu frogz

In the Mirage Comics the Mousers were originally created by Dr. Baxter Stockman, under the premise of selling them to the government, to help fight New York City's Rat problem. However, their creator Baxter Stockman, used them to steal valuables, from bank vaults after his assistant April O'Neil accidentally stumbled on his true intent, to gain billions through crime as he believed himself to be smarter than the authorities.

After April escaped from a secret lab in Baxter's complex and into the sewers she was eventually cornered by several mousers. At the last second the Turtles burst from the shadows and destroyed all the mousers she promptly fainted after the turtles showed themselves to her. After waking up in the Lair and after calming down from the Sight from the Turtles and Master Splinter, she was told of their origins, after that a TV news Bulletin Came on showing a shadowy figure threatening to destroy a building unless he was paid a ransom. The ransom wasn't paid and the building was destroyed, April Instantly sussed out that Stockman was responsible and lead the turtles to the underground lab and tried to help the turtles shut the mousers down. While Leonardo, Raphael and Michaelangelo fought a horde of Mousers off she and Donatello Initiated an Emergency shutdown, It worked and the turtles and April departed from the lab.

Each Mouser was about 60 cm Tall, could hold up to five Rats and were controlled by radio waves and were controlled by a central computer.

1987 Cartoon

Mousers in the 1987 TV series.
OptimuskrymeAdded by Optimuskryme

They appear in the episode A Thing About Rats they were created by scientist Baxter Stockman to rid the town of the rat problem, April O'Neil warns the turtles about how they could go after Splinter, meanwhile they attack him he manages to hold them off until they overwhelm him the turtles come to his rescue and destroy the remaining ones, Shredder is angry about this and orders Stockman to program them to also attack turtles, they attack Splinter and April who manage to hold them off until the turtles arrive to destroy the remaining ones again but April's apartment building collapses due to the Mousers constant chomping and they manage to escape in time, the turtles decide to go after Stockman as he is responsible for the mess so they capture him and squeeze information out of him, meanwhile Michaelangelo sneaks into his mansion to shutdown the Mousers but is captured by Shredder and he orders the rest of the Mousers to attack the turtles, Splinter, and April, Krang frees Michelangelo because he doesn't want Shredder to succeed, so Michelangelo confronts Shredder and taunts him causing his anger to get the better of him he takes out a gun and shoots at him several times accidentally hitting the master control, Donatello takes control of the Mousers with a remote control he swiped from Stockman and commands them to bring down Baxter Stockman's mansion which collapses on top of them destroying them.


Archie Comics

They appear in the issue Heroes in a Half-Shell, Part 2 part of which adapts the A Thing About Rats episode.

2003 Cartoon

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Mousers in the 2003 TV series.
UltimatexAdded by Ultimatex

Their origin is very similar to the comics they first appear in the first episode Things Change as they try to kill Splinter he and the turtles manage to destroy them but at the cost of their lair so they are forced to find a new one. They appear in the next episode we learn that they were created by Baxter Stockman to control the rat problem and April O'Neil is his assistant, meanwhile Donatello gathers the remains of one and fixes it, upon being fixed it goes on a high speed chase where it eventually joins up with hundred of them in the sewer they 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 of their heads eventually destroying all but one which Donatello tries to capture to study but Raphael destroys it before he can. April discovers Baxter is also using them to rob banks and jewelry shops he discovers her and sics four Mousers after her, the turtles rescue her and destroy the ones that were sent after her, she passes out as this is their first meeting and she was initially afraid of them and they bring her to their lair. They explain to Splinter why they brought her with them April wakes up and eventually gets used to them and decides to work with them to destroy the Mousers, they make their way to the laboratory and encounter Stockman, who activates the Mousers to attack them, April and Donatello manage to shutdown the Mousers and make them self-destruct destroying them and putting Baxter Stockman out of business, and 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.

Fast Forward

In the episode Head of State, Agent Bishop and Baxter Stockman create Organic Mousers to protect earth from aliens. Many years later Baxter use 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.


Dreamwave Comics

Mousers appear in the issues A Better Mousetrap and Attack of the Mousers, which are based on the 2003 TV series episodes, of the same names.

Fourth Movie

Two disabled Mousers appear IN Splinter's trophy room, near to end of the film.

IDW Comics

Kung fu frogzAdded by Kung fu frogz
The Mousers appear in the IDW comics as well, but they were created there from the outset by Baxter Stockman for military purposes. They are given the name Mousers, because it is short for, "Minefield Ordnance Unarming System Enhanced Robots". Stockman gives them to Old Hob, to help him fight the turtles. He uses them to attack them in their lair.

2012 series

A Mouser appears in the tie-in prequel comic, where Mikey trips over one. Mikey assumes it to be one of Donny's "toys".
Popup bio mouser
The Mousers in the 2012 sires
Milesprower69Added by Milesprower69

A Robot Drone with a Mouser appearance appears in the episode I Think His Name is Baxter Stockman as part of an advanced combat suit that is separated by Leonardo's katanas and then develops a life of its own. Later Baxter Stockman builds his own version of the Mousers, with the same appearance and purpose as in the Mirage comics.

The Mousers officially appear in the episode Mousers Attack!. This time they behave more like their previous incarnations, burrowing underground to steal valuable items for their master. However, their name is now an acronym for "Mobile Offensive Underground Search Excavation and Retrieval Sentries", indicating that dealing with mice and rats was not their original purpose. Ironically, their vocals sound like cat meows. They attack their targets when said targets are sprayed. At first, Leonardo and Raphael had trouble with the Mousers. Fortunately, Donatello tells them that the spray wears off gradually and if someone got sprayed, it gives off a strong signal. As Baxter attempts to spray all 4 of them, he and Dogpound become the Mousers targets instead after Raphael slices the spray.

They appear again in Baxter's Gambit, summoned by the upgraded Stockman Pod to attack the Turtles, Dogpound, and Fishface.

In Booyaka-Showdown, Part 1, they appear with the brainwashed Kirby O'Neil when Karai captures April. This was the first time out of all of their appearances that they appeared without their creator, Baxter Stockman.

Their first appearance in the 2nd season is in Mikey Gets Shellacne, where they help Baxter Stockman fight the turtles.


Video Games

In almost Mousers are often used as an annoyance enemy in TMNT games, being hard to hit and having cheap attack tactics, but have the tendency to be destroyed easily. However in some, of the video games, far greater Mousers with advanced capabilities appear:

In the first console game, they are featured primarily as enemies in sewers. One of the bosses is Big Mouser, a stationary Mouser that is several times larger than even the player's selected Turtle. It fires beams from its eyes, and is only vulnerable when it opens it mouth to produce another standard Mouser.

In the TMNT arcade game, Mousers break through walls and pavement in hordes, and have the ability to latch onto the player's Turtles' arm, forcing them to shake it off with rapid button presses in order to negate its life-draining bite. The game's third boss, Baxter Stockman, drops Mousers from his floating contraption.

Mousers also appear in the TMNT handheld game developed by Konami, and in Teenage Mutant Ninja Turtles: Fall of the Foot Clan.

They would later reappear in Teenage Mutant Ninja Turtles III: The Manhattan Project. A mini-boss was the Mother Mouser, a large Mouser (although much smaller than its predecessor, the Big Mouser, and its successor, the Giant Mouser), which was piloted by a Foot Soldier.

Mousers also appear in Teenage Mutant Ninja Turtles: Manhattan Missions, Teenage Mutant Ninja Turtles II: Back from the Sewers, and Teenage Mutant Ninja Turtles: Turtles in Time.

Mousers are enemies in Teenage Mutant Ninja Turtles: The Hyperstone Heist. Also, the game's fourth stage boss, Baxter Stockman, drops Mousers from his floating contraption.

Mousers appear in the SNES version of Teenage Mutant Ninja Turtles: Tournament Fighters, they can be seen in the background of Chrome Dome's stage.

The 2003 game again had Mousers as a standard enemy, often appearing as enemies in levels that featured Dr. Baxter Stockman. The boss of Dr. Stockman's lab was a Giant Mouser, which fired missiles and had arms ending in claws similar to its head. The Giant Mouser later reappeared as a mini-boss. Also featured were Prototype Mousers, which were green and slightly more powerful.

Mousers appear in clear boxes in the "Lab" stage of TMNT: Mutant Melee; they serve no direct purpose, other than acting identical to the crates available in the game's other stages. Certain levels have Mousers that can spring forth from the ground and act as a distracting nuisance. Another stage features a Giant Mouser chasing the players through the sewers. Also Mousers are playable when you're character dies in Melee Mode you take control of a Mouser but they can't do any damage they're just used to distract opponents by biting them

Teenage Mutant Ninja Turtles 3: Mutant Nightmare has a legion of Mousers that seem to only be under the employ of Agent Bishop. With elongated heads and electrically charged bodies, these Mousers were stronger than the standard ones, but not as powerful as Dr. Chaplin's Mouser v2.0 series. These Mousers came in red and green hues. Standard Mousers and Mouser 2.0 variations also appeared in this game, in standard and purple variants.

In Teenage Mutant Ninja Turtles: Battle for the City, Mousers are the enemies of the first level and two Giant Mousers are the boss.

Mousers appear in the "Mouser Attack" mode of the game Teenage Mutant Ninja Turtles: The Way of the Warrior .

They are enemies in the game Teenage Mutant Ninja Turtles: Double Damage.

They are enemies in the game Teenage Mutant Ninja Turtles: Arcade Attack.

In the TMNT GBA game, you get a Mouser trophy for eating each type of different health pickup.


A Mouser action figure was released in 1989. A Giant Mouser figure was released in 2004. A mouser figure was also released in 2008.

The S.W.A.T. Battle Pack (2003 toy) and April O'Neil (2009 action figure) also come with Mousers.

In 2013 a Mousers 7-pack based off the 2012 series were released by playmates.


See: Mousers/Gallery

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