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. He is not to be confused with the Little Mousers, which what seem to be small versions of Mouser, but derived from their Japanese name, are completely different.

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 deemed too difficult, and 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 character in The Super Mario Bros. Super Show!. Unlike the in-game appearance, Mouser works for King Koopa and is second-in-command. Like his boss King Koopa, Mouser had many aliases that go with the theme of the episode. His main method of attacking was throwing either bombs or Bob-Ombs. In the show he was voiced by John Stocker, the same person who voiced Toad. He also has a Swiss accent.

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 Mark of Zero
 * The Ten Koopmandments
 * 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.