The Mouse Miraculous is a coin pendant that, whenever Mullo inhabits it, transforms the wearer into a mouse-themed superhero with the power of Multiplication.
To activate the necklace, the user must speak the transformation phrase: "Get Squeaky". To deactivate the necklace, the user must speak the detransformation phrase, which is currently unknown.
In "Destruction", Gabriel used a laser machine to melt down the Miraculous into a pile of dust, and then reforged it into a special Alliance ring for transferring Mullo's power of Multiplication to any Akumatized villain who wore a regular Alliance ring.
In "Re-creation", after Marinette Dupain-Cheng manages to recover all of the Miraculous that were previously stolen, she restores the Mouse Miraculous back to its original form and she gives it back to Mylène permanently.
The Mouse Miraculous is a coin pendant, when Mullo inhabits it, is circular and dark gray with lighter gray markings and five pink mice in a circle on the front of it, attached by light orchid pink bead which is hung on a bead-colored string. If a minor is using the miraculous, the pendant necklace will start running out of power, it’s makes a beeping sound, and the pink mice start running out of power as an indication of how much time (one mice is equivalent to one minute) Mylène (or another Mouse Miraculous holder) has left.
In its activated mode, the mouse symbols turn black.[1]
In its camouflage mode, the pendant changes color and form depending on whose possession it's in:
The Miraculous' camouflaged from when worn by Gabriel.
The Miraculous' camouflaged form when worn by Marinette.
The Miraculous' charged form when worn by Marinette.
The Miraculous' camouflaged form when worn by Chloé.
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In the possession of Mylène Haprèle, it appears as a jade pendant tied to a greenish blackish string.[2]
When it was worn by Gabriel Agreste, it was a silver pendant with lighter silver markings, attached by light silver bead which was hung on a dark silver string.
When it was worn by Chloé Bourgeois, it appeared as a golden pendant tied to a yellow string.[3]
When it was worn by Marinette Dupain-Cheng, it appeared as a dark grayish brown Chinese coin tied to a black string.[4]
In it's reforged ring form, it was a thick band with a circular surface, similar to the Cat Miraculous, inside of it was the symbol of the Mouse Miraculous which glowed grey. It used to sit on the thumb of Gabriel's left hand.
Abilities
The Mouse Miraculous has the ability to transform its wielder into a mouse-themed superhero, granting its wielder incredible superhuman powers of speed, endurance, agility, stamina and strength. It also makes the user nearly invulnerable.
Its special weapon is an unbreakable skip rope, with each end of the rope appearing to have handles attached, which are black with large, silver-colored spheres. This can be also be utilized as both a weapon, a communicator, and an object that can be used to breathe underwater. Its special superpower is named Multitude, which gives the user the ability to shrink down and create numerous clones of themselves for an indeterminate amount of time in order to obtain their goal, like defeating a villain and also shown in "Strikeback" the holder of the Mouse Miraculous can also split into smaller clones of themselves after they have already used it. It is also implied that it's possible that the timer starts only after the holder grows back to their original size, or that the countdown doesn't count while the miraculouses are unified. As long as the superpower isn't used by a minor, the wielder can remain transformed indefinitely. However, as soon as the superpower is used, the wielder loses power and the transformation wears off in about approximately five minutes. The pendant necklace also has the ability to give the wielder the costume they truly desire.
A famous French fashion designer and former Mouse Miraculous holder who also possesed the Butterfly Miraculous. In "Illusion", and "Deflagration" he used them when he transformed into Monarch.
A French teenage girl and a temporary Mouse Miraculous holder. She used the Miraculous to transform into Multimouse. Later, she unified it with the Ladybug, Cat, and Fox Miraculouses to transform into Multibug, Multinoir, and Multifox.
A Japanese woman and an indirect holder of the Mouse Miraculous who used its superpower when she was akumatized in Ikari Gozen and Matagi Gozen in "Multiplication" and "Pretension" without wielding the Miraculous itself.
A famous French fashion designer and an indirect holder of the Mouse Miraculous who used its superpower when he was akumatized in Nightormentor in "Conformation" without wielding the Miraculous itself.
A French man and an indirect holder of the Mouse Miraculous who used its superpower when he was akumatized into Kiku in "Transmission" without wielding the Miraculous itself.
The guardians of the Miraculouses. The Order protected the Mouse Miraculous until the Mother Box was guarded by Su-Han and the incident with Fu's sentimonster.
The last known remaining guardian. He stored the Mouse Miraculous in the Chinese Miracle Box when not in use, until he relinquishes his duty as guardian and lost his memory in the process.
A famous French designer who got the Mouse Miraculous when Félix stole Ladybug's yo-yo, which contained all of the Miraculouses and gave them, along with Gabriel's ring, to exchange them for the Peacock Miraculous.
A French-Chinese teenage girl. After Wang Fu gave up his duty as a guardian and lost his memory in the process, Marinette became the new guardian of the Miraculous. She kept the Mouse Miraculous in the Chinese Miracle Box when it was not in use, but she lost it when Félix steals her yo-yo to exchange all the Miraculous ones that were kept inside it with for the Peacock Miraculous. However, after Monarch was defeated in "Re-creation", she manages to recover the Mouse Miraculous back to its original form and she gives it back to Mylène permanently.
History
The Mouse Miraculous was created thousands of years ago by an Unnamed mage.
Mice symbolize adaptability, cleverness, timidity, and perseverance.
Its power, Multitude, is a reference to the rapid rate at which rodents reproduce.
Under the power of Multitude, the Mouse Miraculous is the only one that can duplicate.
The Mouse Miraculous is stored in a drawer of the Miraculous box below the Ox Miraculous' drawer.
It is possible this is a reference to Mylène's and Ivan's relationship, as the former is the current holder of the Mouse Miraculous and the latter is the current holder of the Ox Miraculous.
The way the Mouse Miraculous holder is wrapped with the skip rope while using Multitude might be a reference to the way Arthur shrinks in Arthur and the Invisibles.
It's the second Miraculous being a pendant or locket, the first is the Fox Miraculous.
Coincidentally, they are the first Miraculous to be shown combining in the series.
In "Kwamibuster" Marinette Dupain-Cheng borrows the Mouse Miraculous from Wang Fu so she could become the mouse-themed heroine, Multimouse, after Tikki and Plagg were captured by the titular villain. Multimouse also unifies the Mouse Miraculous with the Fox, Cat, and Ladybug Miraculouses to become Multifox, Multinoir, and Multibug.
According to Thomas Astruc, the names of the two Mouse Miraculous holders were mixed up. Mylène was to be called "Multimouse" and Marinette was to be called "Polymouse". However, somewhere down the line, Marinette was referred to as "Multimouse", so Mylène's name had to be changed as well.[5]