Synopsis
The hero receives a mysterious letter, inside which he finds a constructor capable of turning any object into a mouse.
You might also like

Greg Heffley is a scrawny but ambitious kid with an active imagination and big plans to be rich and famous – he just has to survive middle school first.
Diary of a Wimpy Kid

Jasper is given an ultimatum by his master: break one more thing and you're out. Rodent Jerry does his best to make sure that his tormentor "gets the boot".
Puss Gets the Boot

A widowed field mouse must move her family -- including an ailing son -- to escape a farmer's plow. Aided by a crow and a pack of superintelligent, escaped lab rats, the brave mother struggles to transplant her home to firmer ground.
The Secret of NIMH

Mickey, Minnie, Horace Horsecollar, and Clarabelle Cow go on a musical wagon ride until Peg-Leg Pete tries to run them off the road.
Get a Horse!

An intelligent 15-year-old high school student is unexpectedly transferred to a boarding school where he opens a portal of monsters from another dimension.
Cranston Academy: Monster Zone

Little Fedor brings a cat to home despite his mother's distaste for cats. He runs away with his talking cat, to make more friends on the way.
Three from Prostokvashino

An animated retelling of ‘Night of the Living Dead’, in which a group of people in a rural farmhouse struggle to survive the threat of bloodthirsty zombies.
Night of the Animated Dead

The lovably simple residents of peaceful Kikoriki Island are thrown kicking and screaming into big adventure, when their resident scientist invents an amazing device - a helmet called "the Improverizor," which takes personality traits from one person and swaps them with traits of someone else. But when spineless young Wally tries to use the untested device to cure his cowardice, he ends up even more spineless - by getting accidentally body-switched with a squirmy little caterpillar. Now he has even more to fear than he could have ever imagined, and so do his fellow villagers, as they're dragged into a madcap adventure packed with plane crashes, mistaken identities, erupting volcanoes and angry primitives on the warpath. Boy, do the Kikoriki Crew wish they could switch place now - with anyone.
Kikoriki. Legend of the Golden Dragon

A young chambermaid finds a neglected nutcracker under a Christmas tree. It comes to life, but the Nutcracker is really an enchanted prince.
The Nutcracker

A grandmother is caught between her two favorite things when her granddaughter is unexpectedly dropped off during the day she was planning to spend watching her favorite TV show.
Nona

Once upon a time... in the far away kingdom of Dor... lived a brave and virtuous mouse with comically oversized ears who dreamt of becoming a knight. Banished from his home for having such lofty ambitions, Despereaux sets off on an amazing adventure with his good-hearted rat friend Roscuro, who leads him, at long last, on a very noble quest to rescue an endangered princess and save an entire kingdom from darkness.
The Tale of Despereaux

Across different eras, a poor family, an anxious developer and a fed-up landlady become tied to the same mysterious house in this animated dark comedy.
The House

Plankton's tangled love story with his sentient computer wife goes sideways when she takes a stand — and decides to destroy the world without him.
Plankton: The Movie

The first day of Spring is on its way and the Little Ponies are preparing for it with a big festival. But all the fun may come to an end if the witch Hydia has her way! Can the Ponies defeat Hydia and her evil daughters, Reeka and Draggle? More importantly, can they save Ponyland from the witches’ concoction, the strange purple goo called Smooze, that’s threatening to bury the whole town?
My Little Pony: The Movie

The continuation of the adventures of Fyodor and his friends from the Prostokvashino village.
Vacations in Prostokvashino

The magical tale of a mouse who sets foot on a woodland adventure in search of a nut. Encountering predators who all wish to eat him - Fox, Owl and Snake - the brave mouse creates a terrifying, imaginary monster to frighten them away. But what will the mouse do when he meets this frightful monster for real?
The Gruffalo

Mickey and gang must stop hundreds of old film reel versions of Mickey from wreaking havoc all over town.
The Wonderful World of Mickey Mouse: Steamboat Silly

On the heels of successfully escaping a deadly digital trap, the members of the Justice League emerge in their own world to discover that Grimm, ravenous creatures from Remnant, have overtaken Earth! In order to defeat the monsters, they must call on their new friends – Team RWBY – for help!
Justice League x RWBY: Super Heroes & Huntsmen, Part Two

Three unlikely heroes - Nachi, a free-spirited coati; Xochi, a fearless monarch butterfly and Pako, a hyperactive glass frog - embark on an adventure to stop wicked coral snake Zaina from destroying their rain forest homeland.
Koati

A plover chick has not learned to fly when his family migrates in the fall. He must survive the arctic winter, vicious enemies and himself in order to be reunited with his beloved one next spring.