Mouser

Mouser is a large, anthropomorphic mouse who wears sunglasses, gloves and boots. He is a resident of Subcon, the land of dreams. Not much is revealed about Mouser, though it is mentioned that he is prideful and utilizes his bombs to destroy good dreams.

Yume Kōjō: Doki Doki Panic
Mouser made his debut in Yume Kōjō: Doki Doki Panic. Mouser helped Wart to invade the secret world of a storybook with his bombs. He is fought three times in the game: in World 1-3, World 3-3 and World 5-3, with a powerful white Mouser with red shoes and gloves exclusively appearing in the latter level, taking seven hits to defeat.

Super Mario Bros. 2
In Super Mario Bros. 2, Mouser appears twice, one, with pink ears and shoes, in World 1-3 and the other, with green ears and shoes, in World 3-3 (The differing colors are only in the NES version.). The fight in World 5-3 of Yume Kōjō: Doki Doki Panic was replaced by Clawgrip. In battle, Mouser throws bombs at the player, which will explode after a short time. In order to injure Mouser, players need to grab one of these bombs and throw them back at him so that it explodes near or on the rodent; doing this several times (He takes three hits in World 1-3, and five in World 3-3.) will defeat him.

In Super Mario Advance, a new boss, Robirdo, replaced his second battle in World 3, which itself replaced Tryclyde's second battle in World 6; Tryclyde remained the boss of World 2. Like the main cast and the various bosses, he was given voice acting. His lines were performed by Charles Martinet, who voiced him with a snide tone. Upon defeat, Mouser can be heard exclaiming, "No way!"

BS Super Mario USA
In BS Super Mario USA, Mouser, Birdo and Wart have returned to Subcon to invade it again. Mouser is found in World 1-3 as the main boss of the world. He is no different than in the original game. However, like Wart and the Birdos, he could cast his own magic spell; such as turning enemies and objects into bombs, and throwing giant bombs out of nowhere.

The Super Mario Bros. Super Show!


Mouser is a prominent villain in The Super Mario Bros. Super Show!. Unlike his appearance in Super Mario Bros. 2, Mouser works as second-in-command under King Koopa rather than being a part of the 8 bits. Like Koopa, Mouser has many aliases that often match the general theme of the episode in which he appears. His main method of attacking is to throw either bombs or Bob-Ombs.

Mouser is voiced by John Stocker, the same actor who voices Toad, and is given a Swiss accent. He appears in 23 episodes, but has a speaking role in only 21.

"Butch Mario & The Luigi Kid"
In this episode, Mouser is referred to as Sheriff Mouser, wearing a purple bandanna around his neck, a brown cowboy hat, and a star-shaped badge.

Sheriff Mouser first appears to surprise Mario, Luigi, and Toad when they walk up a hill. He attempts to arrest them with a band of Snifits and Ostros. After fleeing, Mario and his friends encounter and jump across a waterfall. Mouser attempts to jump by claiming, "If they can do it, so can I!", hesitating, and then nervously saying that his cronies can go first. After they fail and fall into the waterfall, Mouser begins to cry.

After Mario and friends go to a mine where Princess Toadstool is trapped, Mouser surrounds them with his band and tells them to "reach for the sky." However, a Tweeter then gets into an argument with him, distracting him, and Mario and co. quickly run away. Mouser then throws a bomb at the mine, and a resulting boulder chases Mario and co. Eventually, they get exhausted, fall for a trap, and are captured.

Mario and Luigi hatch a plan to trick Mouser by begging for water. He brings a glass, only to drink it in front of them. Mario and Luigi then play a game of Patty Cake, and Mouser exclaims, "Hey! What are you loonies up to?" Mario then knocks Mouser's hat off, allowing Toad to sneak inside. Mouser puts the hat back on, unaware of Toad's presence.

Mouser then arrives at a bar for a drink. Toad sneaks from the hat and steals Mouser's bombs to bomb Mario and Luigi's jail cell. When Mouser notices that Mario and his friends are free, he orders his pack of Koopa Troopas to stop them. Mario and Luigi run to the mine where Princess Toadstool is trapped, and Mouser allows 'Kid Koopa', an alias for King Koopa, to stop them. However, Koopa fails, and the princess is rescued.

"Rolling Down the River"
In this episode, Mouser is referred to as First Mate Mouser, wearing a dark purple bandanna, glasses with one half broken resembling an eye patch, and a red-and-white striped shirt.

First Mate Mouser appears from below deck to report to 'Captain Koopa', another of King Koopa's aliases, that he has found no trace of any stowaways. Not satisfied with this, Koopa violently shoves Mouser aside and ventures below the deck of the Sinister Star. Later, he keeps lookout with a telescope. Seeing a rival ship named the Ding Bell, Mouser proceeds to alert Koopa of this. Grabbing the telescope from Mouser, Koopa sees Mario and Luigi riding the Ding Bell; furious, he throws his telescope to the ground and stomps on it.

King Koopa orders Mouser to bring him a Black Pit Bob-Omb; hesitantly, Mouser brings forth a chest containing an enormous Bob-Omb and passes the explosive to Koopa.

Mouser is next seen with King Koopa looking quite bored before noticing the Ding Bell yet again. after it crossed the pit. Koopa, in his frustration, throws his telescope at Mouser and proceeds to stomp on it again when it lands on the ground.

When Koopa subdues the Mario Bros. later, Mouser helps him force Mario to walk the plank.

"The Great BMX Race"
Mouser first appears right when Mario and Luigi are about to start the race to prevent Toad from burning caused by a Fryguy. Mouser starts taunting the Mario Bros. by saying, "Looks like you forgot your training wheels, sewer sap," and then starts laughing, along with Tryclyde and a Koopa Troopa, and he falls off his motorbike. Right when he gets up, Mario and Luigi leaves them behind by starting the race. Team Koopa then pursues the Mario Bros., with King Koopa aiding them through use of a helmet that can transfer King Koopa's orders directly to Team Koopa.

Team Koopa then sees Toadstool and Toad in the road and capture them. After the Mario Bros. stop to have a snack, Team Koopa passes them quickly, making them spin and fall off their bike, which slows them down. Team Koopa then drives up a steep incline, while the Mario Bros. follow them. Team Koopa then drives downhill, and the Mario Bros. hit a rock and fall down a cliff. Team Koopa thinks that it is the last of them, and Mouser exclaims, "Poor plumbers went POW!" Shortly after exclaiming this, the Mario Bros. drives past them and Mario says, "Sorry we can't stay and chat with you goons, but we have a race to win!" Team Koopa then gets bewildered by this.

While racing, Team Koopa catches up to the Mario Bros. The Mario Bros. throws tomato sauce on the road, and the Koopa Troopa and Tryclyde gets caught in it, and they lose control, losing speed. Mouser avoids this and throws Bob-Ombs at the Mario Bros. which they avoid. Mouser gets caught in the smoke, coughs, and loses speed. When the Koopa Troopa throws a rock, the Mario Bros. avoids it, but gets their wheels punctured by the spikes of the shattered rock. Mouser and his team surrounds the Mario Bros., and Mouser is ready with his Bob-Omb to annihilate the Mario Bros. The Mario Bros. then spin in circles, making a lot of dust in to obscure Team Koopa's view and makes them cough, while the Mario Bros runs away to a vegetable patch.

Team Koopa tries to follow them, but Mario and Luigi successfully throws vegetables at them, first hitting Mouser with a large zucchini, then the rest of the team with another horde of vegetables. Team Koopa finally gives up and leave in dismay with their destroyed karts, with the Mario Bros. waving them off.

"Stars in Their Eyes"
In this episode, Mouser is referred to as Astro Mouser, wearing a purple jumpsuit and space helmet.

On the planet Quirk, Mouser throws a bomb at two Quirks, the planet's inhabitants, and demands they work harder and faster. Soon after, Mario's spaceship, after being forced to land by an array of meteors, crashes on top of a dumbstruck Mouser. The Quirks come to thank Mario and his friends for subduing Mouser, who slides out of the ship, appearing squished. Mouser then growls and throws squished Bob-Ombs at Mario and co. while they escape with the Quirks on a raft. He throws a Bob-Omb in the river, which springs a leak on the raft. Mario fixes the leak, however, which propels the crew away from Mouser. Mouser then alerts King Koopa about Mario and his friends entering the planet.

"Toad Warriors"
After a long series of absences, Mouser finally returns. He is first seen in Car Land when State Troopa had Mario and co. surrounded. Next, Mouser joins King Koopa to go to the Rebel Fort, but then the car is flipped. King Koopa tells Mouser that he a mouse-brain because he spent all the gold coin he wasted for his pack's driver's ed classes. Mouser then alerts King Koopa that the Marios escaped. He then ambushes the Marios, but Mario, Luigi, and Toad bump into a truck. He then brings the Thunder Birdo and lets the egg hit the fort, producing a large amount of smoke.

Mouser, who wonders what happened to the Mario and co., suddenly gets ambushed by Mario and Princess Toadstool, who is riding a truck with spaghetti sauce, Luigi, who is riding a helicopter, and Toad Warrior. He again rides the car with the big Birdo, but the car get exploded by Toadstool, who threw the bag of bombs into the big Birdo. A Bob-Omb is thrown at Mouser, causing him to then disappear, never to be seen for the rest of the episode.

List of episodes featuring Mouser

 * "Butch Mario & The Luigi Kid"
 * "Rolling Down the River"
 * "The Great BMX Race"
 * "Stars in Their Eyes"
 * "Toad Warriors"
 * "The Fire of Hercufleas"
 * "Count Koopula"
 * "Pirates of Koopa"
 * "The Adventures of Sherlock Mario"
 * "Do You Princess Toadstool Take this Koopa...?"
 * "The Pied Koopa"
 * "Koopenstein"
 * "On Her Majesty's Sewer Service"
 * "Mighty McMario and the Pot of Gold"
 * "The Unzappables"
 * "The Ten Koopmandments"
 * "The Mark of Zero"
 * "Plummers Academy"
 * "Karate Koopa"
 * "Princess, I Shrunk the Mario Brothers"
 * "Escape from Koopatraz"
 * "Raiders of the Lost Mushroom"
 * "Star Koopa"

Nintendo Comics System
In the Nintendo Comics System, Mouser is said to have been the leader of similar looking rats called Mice, before defecting to King Koopa.

"A Mouser in the Houser"
In the Nintendo Comics System issue "A Mouser in the Houser", it is revealed that the Mice once had a prosperous society, having dug the Transport Tube system and hidden all the treasures they found in it. Eventually, the society of the Mice began to crumble when their king, Mouser, abandoned them and joined Bowser.

In the aforementioned comic "A Mouser in the Houser", several Mice abduct Princess Toadstool after she becomes lost in the Transport Tube system. After kidnapping the princess, the Mice reveal their origin to her and offer her the position of their queen, saying that if she agreed to this proposal, she could have a map of the Transport Tube system, as well as dozens of ready troops to help her defeat Bowser. Princess Toadstool eventually rejects the offer of becoming queen of the Mice when they refuse to help her aid Mario, who was being attacked by Mouser.

"The Buddy System"
In a later issue of Nintendo Comics System entitled "The Buddy System", a large group of Mice appear to capture Mario and Bowser when the two become lost in the Transport Tube system. Shackling Mario and Bowser together, these Mice interrogate them and learn that Bowser had planned on flooding the Transport Tube system by blowing up the main water valve of it. Deciding to aid Bowser in his plot of destroying the Transport Tube system, this group of Mice use bombs to blow up the main water valve, which causes a large amount of water to flow through the Transport Tube system and wash them away.

"Bedtime for Drain-Head"
Though several Mice appear on the alternate cover of another Nintendo Comics System comic entitled "Bedtime for Drain-Head", no Mice actually appear in the story.

Super Mario Bros. & Friends: When I Grow Up
In Super Mario Bros. & Friends: When I Grow Up, Mouser briefly appears as a disk jockey in the "Disk Jockey" career page. The page states the following:


 * Mouser is one cool disc jockey! His morning show is a big hit on the radio. Everyone loves "The Mouser in the Morning Show." Everyone except for Mario the sound engineer. "I think I'll go get a job at a library!" says Mario. "I need some peace and quiet. That Mouser plays his music too loud in the studio."

Super Smash Bros. Brawl
Mouser makes an appearance as a sticker in Super Smash Bros. Brawl. When used on any fighter in The Subspace Emissary, it boosts their arm attack power by 20 points.

Super Smash Bros. Ultimate
Mouser appears as a Novice-class Grab-type primary spirit in Super Smash Bros. Ultimate. When used, it boosts the fighter's power without granting any special effect. In World of Light, the spirit is found on the Light Realm map. The spirit battle takes place on the Battlefield form of the Mushroom Kingdom II stage, with Pikachu as an opponent and Bob-ombs as the only items that spawn.

The core extracted from a Mouser spirit can be combined with a Count Cannoli core and two other Neutral cores to summon the Daroach spirit.

Physical description
Mouser, like the rest of his species, is an anthropomorphic mouse that wears sunglasses that covers his eyes in most cases. When his eyes aren't covered, it is shown to be a white eye with a black pupil. He has gray fur, pink ears, a fur-less snout with a full set of teeth, and a fur-less tail. In Mouser's normal appearance, he lacks clothing, except for red gloves, red shoes and his sunglasses. Mouser does take on aliases, like King Koopa, where he wears an outfit to match the theme of the episode and he gets mentioned by a title, such as First Mate Mouser. In the show, Mouser has a Swiss accent, which is indicated by saying "zat" instead of "that" and other phrases where it is clearly defined. There are also references to his love of Swiss cheese.

Personality
In the cartoons, Mouser, like his boss, King Koopa, is an antagonist of Mario and his friends and he will do anything he can to capture them. Mouser also likes to use bombs as his primary form of attack. Even though he is second-in-command, his pack members still obey him, as seen in "Butch Mario & The Luigi Kid." Mouser, however, does laugh at King Koopa when something embarrassing happens to him, as demonstrated in the episode, "The Adventures of Sherlock Mario" when Herlock Solmes recalls King Koopa's embarrassing memories of his past, though he is still afraid when King Koopa threatens or gets angry at him.

Trivia

 * In Mario & Luigi: Bowser's Inside Story, after Bowser gets to his old castle which was taken over by Fawful and renamed Fawful's Theater, a Shy Guy says "This castle... it had a name... long ago... Browser's Castle? Mouser's Castle? Wowser?"
 * In the Star Fox comic "Farewell, Beloved Falco", a mouse resembling Mouser is a member of the "FREE AS A BIRD" gang of space hot-rodders.
 * There are some unused sprites in Super Mario Advance of what appears to be a Porcupo-like mouse enemy, indicating that he started out as a regular enemy type before undergoing a transformation, much like Fryguy and Clawgrip.
 * The episode Quest for Pizza introduces Mousersaurus Rex, a T-Rex-like dinosaur that looks like Mouser.
 * In "Butch Mario & The Luigi Kid" and "Rolling Down the River", Mouser's voice was high-pitched. In the other episodes, his voice was low-pitched.
 * In "The Unzappables", Mouser mentions cheese a few times. He even said that the password for the Koopa Klub is "cheese balls".
 * In some episodes, Mouser usually battles Toad, which might be reference to the same person voicing them.