Yoshi and the Mysterious Book

Yoshi and the Mysterious Book
American box art For alternate box art, see the related gallery.
Developer	Good-Feel
Publisher	Nintendo
Platform	Nintendo Switch 2
Engine	Unreal Engine 5
Release date	May 21, 2026
Languages	English Japanese Chinese (Simplified) Chinese (Traditional) Dutch French (Canada) French (Europe) German Italian Korean Portuguese (Brazil) Spanish (Latin America) Spanish (Europe)
Genre	Platformer
Ratings	ESRB: - Everyone CERO: - All ages PEGI: - Seven years and older USK: - All ages ClassInd: - General audience SMECCV: - All ages Gmedia: - Seven years and older GRAC: - All ages GSRR: - Six years and older UAE-NMA: - Seven years and older ACB: - General FPB: - Parental guidance
Format	Nintendo Switch 2: Game Card Digital download
Input	Nintendo Switch 2: Joy-Con 2 Joy-Con Joy-Con 2 (horizontal) Joy-Con (horizontal) Nintendo Switch 2 Pro Controller Nintendo Switch Pro Controller
Serial codes	LB-AAKGA-EUR-0 LB-AAKGA-JPN-0 LB-AAKGA-KOR-0 LB-AAKGA-USA-0

Yoshi and the Mysterious Book is a side-scrolling platform game in the Yoshi series developed by Good-Feel, and released worldwide for the Nintendo Switch 2 on May 21, 2026 as part of the Super Mario Bros. 40th Anniversary celebration. The game features a distinct art style resembling paper illustration, featuring low-frame rate animations, painterly textures on Yoshi and interactive creatures, and pencil-esque outlines on faraway objects.

On May 7, 2026, a free demo for the game was released at select Best Buy, Target, Walmart, and GameStop stores in the United States. In Canada, the demo is also available at Walmart and Best Buy stores since May 12, with the demo coming out on May 21 in EB Games and London Drugs stores.

On July 9, 2026, a free demo—which includes the Crazee Dayzee, Bunchabee, and Scatterpuff Habitats—was released on the Nintendo eShop, and any save files from the demo can be transferred over to the full version of the game.

Story

Yoshi during the game's intro

One day in Bowser's Castle, Bowser Jr. walks into a library and finds an unconscious, sentient book known as Mister Encyclopedia (Mr. E for short) on top of a pile of books. Upon opening the book, he sees an illustration of a creature known as the Bewilder Bird flying near Yoshi's Island. Soon after, Bowser Jr. flies to the island with the Junior Clown Car and the book in tow. During his flight, he notices a small magnifying glass dangling from the bottom of the book. Upon using the glass to inspect the book, he gets sucked into it in a flash of light, leaving the Junior Clown Car to crash onto the island without its pilot.

While Yoshi is eating apples from a tree, he and his friends see the Junior Clown Car and Mr. E falling from the sky. As he cannot read his own pages, which hold information on various creatures, Yoshi uses Mr. E's magnifying glass to magically jump into his pages and help investigate them. Inside Mr. E's pages, Yoshi discovers information about each creature, which is then written down in Mr. E.

While exploring Mr. E's pages, Yoshi encounters Kamek and later Bowser Jr. The two repeatedly cross paths with Yoshi while pursuing the elusive Bewilder Bird across various habitats.

Eventually, in the Bewilder Bird Habitat, Yoshi discovers a Crazee Dayzee, which is revealed to be a juvenile Bewilder Bird in disguise. This creature becomes Yoshi's ally for the rest of the habitat and reunites with an adult Bewilder Bird after Yoshi defeats Bowser Jr. and Kamek.

In the aftermath, Mr. E reveals that he was created by a professor to protect all the creatures the Yoshis have been discovering from extinction. He asks the Yoshis to continue helping him document the remaining creatures, and they agree. As they explore more pages from Mr. E, Yoshi once again encounters Kamek and Bowser Jr., who are trying to return to Bowser's Castle but keep getting captured by giant creatures throughout the habitats. Yoshi uses the help of previous allies to rescue them.

Yoshi eventually reaches the Moon, where he reunites with a juvenile Bewilder Bird that can transform into any cataloged creature, aiding Yoshi in rescuing Bowser Jr. and Kamek from a giant vine that has captured them and pulled them underground. Together, Yoshi and the Bewilder Bird reach the core of the Moon to rescue Bowser Jr. and Kamek, but they are then captured by a creature residing there.

It is revealed that the enormous moon hanging above is a colossal Crazee Dayzee on a collision course with Earth. To prevent a disaster, Yoshi must destroy its core. After Yoshi defeats the Moon creature and saves Bowser Jr. and Kamek, a portal opens. He bids farewell to the juvenile Bewilder Bird, which returns to its adult counterpart. They then exit Mr. E's pages just before the Moon explodes.

Back on Yoshi's Island, Kamek, Bowser Jr., and Yoshi emerge from the book. Mr. E congratulates Yoshi for assisting the creatures. Grateful to be back, Bowser Jr. and Kamek leave the island to return to Bowser's Castle and share their experiences. Upon returning to the Castle, Kamek sees Bowser as an adult and Bowser Jr. as his son, which brings him to tears for all the years he missed.

Gameplay

Yoshi exploring a level with a Crazee Dayzee on his back

Yoshi and the Mysterious Book is a side-scrolling platformer starring Yoshi. In the game, Yoshi retains his main abilities from previous Yoshi games. He can eat creatures and objects with his tongue to create eggs, and then aim and throw them at other creatures or objects. Yoshi can also Flutter Jump and Ground Pound. A new move introduced is the Tail Flick, which lets Yoshi grab creatures and carry them on his back. While carrying a creature, Yoshi can make use of their abilities, such as using Crazee Dayzees to make flowers bloom. Other creatures instead help Yoshi traverse in new ways, such as riding on them like a surfboard or floating inside bubbles they create. Yoshi does not lose health when hit by creatures and cannot be defeated in this game.

The levels in the game are focused more towards exploration and discovery, lacking any time limit or game over. Each level is composed of a specific creature's habitat, which starts unnamed. The player's overall objective is to study this creature by discovering its traits. Traits can be discovered by interacting with the creature itself, or by using it to interact with the environment or other creatures. After completing the main goal of each habitat, the player then exits Mr. E, and the traits learned about the creature are written down in his pages. A Star is awarded for each discovery, with one large discovery awarding three Stars and signalling the end of the level. Afterwards, all discoveries are logged on Mr. E's pages and the creature can be named by the player or by Mr. E.

Names given by the player are subject to the following conditions: they can be up to ten characters long, cannot include words that match an entry in the Nintendo Switch system software's word filter, must not be the same name as another creature's, and are not equivalent to the name of a main character.

Smiley Flowers are scattered across Mr. E's pages. Each chapter shows how many Smiley Flowers there are for each level, as well as how many have been obtained. Finding them rewards Exploration Tools (using five to unlock a tool), interaction with the page's creatures, and puzzle-solving.

Tokens collected during levels can be used to unlock hints towards discoveries which have not been found yet. Initially, they reveal a silhouette of the discovery, but spending more tokens unlocks further details.

Chapters

The game consists of 12 chapters, and Stars can be used to unlock new chapters in the book. Beating the initial six chapters displays the credits, and unlocks four additional chapters, which upon completion displays the credits again and unlocks the last two bonus chapters.

Chapter	Level	Creature studied	Unlock criteria
Chapter 1: Wildwoods	Crazee Dayzee Habitat	Crazee Dayzee	Unlocked by default
	Bunchabee Habitat	Bunchabee
	Scatterpuff Habitat	Scatterpuff
	Croakaoke Habitat	Croakaoke
	Glubbit Habitat	Glubbit
Chapter 2: Mountaintops	Taggit Habitat	Taggit	20 ★
	Milde Habitat	Milde
	Peckadee Nest	Peckadee
	Floofly Habitat	Floofly
	Plumebrella Habitat	Plumebrella
	Thudd Domain	Thudd
Chapter 3: Seaside	Weewoo Habitat	Weewoo	65 ★
	Ouchin Habitat	Ouchin
	Casterway Habitat	Casterway
	Bafloonder Habitat	Bafloonder
	Snurfboard Habitat	Snurfboard
	Nep-Enut Habitat	Nep-Enut
Chapter 4: Settled Valley	Loopdeecoop Habitat	Loopdeecoop	114 ★
	Detonut Habitat	Detonut
	Shy Guy Abode	Shy Guy
	Bugya Habitat	Bugya
	Little Mouser Nest	Little Mouser
	Hauger Habitat	Hauger
Chapter 5: Bug Country	Behedger Habitat	Behedger	167 ★
	Swirm Habitat	Swirm
	Stickiwick Habitat	Stickiwick
	Mawstalk Habitat	Mawstalk
	Slugarang Habitat	Slugarang
	Wooshwing Habitat	Wooshwing
Chapter 6: Remote Isle	Goonie Habitat	Goonie	218 ★
	Huffin Puffin Habitat	Huffin Puffin
	Jetty Jelly Habitat	Jetty Jelly
	Lunge Fish Habitat	Lunge Fish
	Jam Guy Habitat	Jam Guy
	Bewilder Bird Habitat	Bewilder Bird
Chapter 7: Underground	Tumball Nest	Tumball	Complete the first six chapters 285 ★
	Wiggaline Habitat	Wiggaline
	Goopsie Habitat	Goopsie
	Underbit Habitat	Underbit
	Billeau Habitat	Billeau
	Crudwurm Domain	Crudwurm
Chapter 8: Tallest of Trees	Piranha Plant Habitat	Piranha Plant	Complete the first six chapters 353 ★
	Bounseed Habitat	Bounseed
	Wash Squash Habitat	Wash Squash
	Grab-Grass Nest	Grab-Grass
	Spincone Habitat	Spincone
	Gobbobble Nest	Gobbobble
Chapter 9: Miniworld	Magnified Floofly	Floofly	Complete the first six chapters 421 ★
	Magnified Scatterpuff	Scatterpuff
	Magnified Upshoot	Upshoot
	Magnified Hufungous	Hufungous
	Magnified Springhopper	Springhopper
	Magnified Lunge Fish	Lunge Fish
Chapter 10: Moon	Blorp Habitat	Blorp	Complete the first six chapters 500 ★
	Raven Habitat	Raven
	Cuttlefwoosh Habitat	Cuttlefwoosh
	Eleedee Habitat	Eleedee
	Yu Ef Oh Base	Yu Ef Oh
	Crazee Dayzee	Crazee Dayzee
Chapter 11: Special Studies	Short-to-Tall Roll Call	—	Complete the first ten chapters 717 ★
	Seaside Speed Rankings	—
	Sneaky Hide and Seek	—
	Merry Music Festival	—
	All-Terrain Race	—
	A Perilous Passage	—
Chapter 12: Mr. E's Challenges	Explode to Escape	—	Complete the first ten chapters 999 ★
	Protect the Apple	—
	Twilight Bug Catching	—
	Flee from the Leaf	—
	Survive the Risky Skies	—
	Hop or Drop	—

Characters

Character	Description
Yoshi	The main playable character of the game. There are 8 different colored Yoshis to play as: Green, Orange, Pink, Yellow, Light Blue, Red, Blue, and Purple. Each of these colorful options shares the same abilities to use between explorations.
Mr. E	Short for Mister Encyclopedia; a living magical book that falls onto Yoshi's Island, but is incapable of reading his own pages. He seeks the aid of the Yoshis to catalog the creatures on his pages.
Kamek & Bowser Jr.	The main antagonists who get trapped respectively inside Mr. E's pages in pursuit of a mythical Bewilder Bird. They repeatedly encounter Yoshi in boss fights to capture the elusive bird throughout the game.

Creatures

Index

These creatures can be named by the player after the completion of their introductory levels. The player cannot use the same name for multiple creatures, however. Here, the names given are those suggested by Mr. E.

The complete page of Crazee Dayzee.

The Index page 1-2 of the creatures.

The creatures from Mr. E's book.

Creature	Description	Total		First appearance	Last appearance
		Discoveries	Stars
Crazee Dayzee	Flower-like creatures capable of making other flowers bloom around them.	33	43	Crazee Dayzee Habitat	Flee from the Leaf
Bunchabee	A small bee with a pointed head that appears in swarms.	29	39	Bunchabee Habitat
Bunchabee (big)	A larger Bunchabee.	–	–	Bunchabee Habitat
Scatterpuff	Dandelions can be scattered by walking through them. Their seed heads can take root on other objects, causing boulders to crack and enemies to stop moving.	26	37	Scatterpuff Habitat	A Perilous Passage
Croakaoke	Squat duck-like creatures carrying leaves on their heads. They sing notes and can propel Yoshi to higher places when jumped on.	31	41	Croakaoke Habitat	Flee from the Leaf
Glubbit	A frog-like creature with a mouth that resembles a bubble wand. It can create bubbles that Yoshi can enter.	23	30	Glubbit Habitat	Sneaky Hide and Seek
Taggit	Small creatures of varying colors that try to run away from Yoshi.	29	37	Taggit Habitat	All-Terrain Race
Milde	A round pink bubblegum-like creature that pops if stepped on. They can also be blown like bubblegum.	35	47	Milde Habitat	Short-to-Tall Roll Call
Hefty Milde	A larger Milde which split into regular Mildes when jumped on.	–	–	Milde Habitat	Short-to-Tall Roll Call
Big Milde	Even larger Milde which split into several Mildes and a Hefty Milde when jumped on.	–	–	Milde Habitat	Short-to-Tall Roll Call
Mega Milde	The largest form of Milde which split into several Mildes and a Big Milde when jumped on.	–	–	Milde Habitat	Short-to-Tall Roll Call
Peckadee	A teardrop-shaped creature with gray, white and black stripes.	32	40	Peckadee Nest	Twilight Bug Catching
Floofly	A floating cloud with a face and small green wings. Yoshi can ride on them in a similar manner to Para-Beetles.	26	37	Floofly Habitat	Survive the Risky Skies
Big Floofly	A large, hefty-looking Floofly, made from combining several Flooflies.	–	–	Floofly Habitat	Yu Ef Oh Base
Plumebrella	An umbrella-like bird creature that Yoshi can use to fall more slowly.	25	32	Plumebrella Habitat
Thudd	A giant green creature with goofy eyes, plants growing over it, and a large belly button. It can suck up and shoot Yoshi into the distance.	26	37	Thudd Domain	Short-to-Tall Roll Call
Weewoo	A sea snail-like creature which can play music that can trigger various effects.	28	36	Weewoo Habitat	Merry Music Festival
Ouchin	An urchin- or burr-like creature which sticks to surfaces.	25	33	Weewoo Habitat	Survive the Risky Skies
Casterway	A creature resembling a Spray Fish that uses its fishing rod to catch fish.	27	37	Casterway Habitat
Bafloonder	A balloon-like pufferfish. It changes colors based on how large it is, and can boost Yoshi through the water by blowing bubbles from its fin.	28	35	Bafloonder Habitat	Seaside Speed Rankings
Snurfboard	A skateboard-like creature that can carry Yoshi over water.	28	40	Snurfboard Habitat	All-Terrain Race
Small Snurfboard	A smaller version of the Snurfboard that is collected by Yoshi.	–	–	Snurfboard Habitat
Nep-Enut	A creature made of water which can grow when combined with others.	25	36	Nep-Enut Habitat	All-Terrain Race
Loopdeecoop	A pink bird with a tall neck spinning a hula hoop.	30	38	Loopdeecoop Habitat	Yu Ef Oh Base
Detonut	A chestnut-like creature that explodes.	31	39	Detonut Habitat	Survive the Risky Skies
Shy Guy	Masked, hooded creatures.	24	34	Shy Guy Abode	Sneaky Hide and Seek
Bugya	A purple fly-like creature with huge lips that uses watermelons as armor and spits seeds.	27	38	Bugya Habitat	A Perilous Passage
Little Mouser	A purple rat thief who can steal objects and creatures from Yoshi's back.	30	39	Little Mouser Nest	Protect the Apple
Hauger	A large, boar-like creature with a red mane that can be ridden by Yoshi. It can jump high in the air and rotate its face like a drill.	25	32	Scatterpuff Habitat	All-Terrain Race
Behedger	A large creature disguised as a bush that attacks with large scythe-like appendages.	30	38	Behedger Habitat	A Perilous Passage
Swirm	A snail that leaves a trail of slime where it walks. When touched, it uncoils and sticks up in the air.	30	38	Swirm Habitat	Short-to-Tall Roll Call
Stickiwick	A spider-like creature that swings by a string of silk from its web.	29	36	Stickiwick Habitat
Mawstalk	A green net-like creature with teeth that can be swung down to eat other creatures.	33	43	Mawstalk Habitat	Twilight Bug Catching
Slugarang	A boomerang-shaped slug creature that Yoshi can gulp up and use as a projectile.	28	37	Slugarang Habitat	A Perilous Passage
Wooshwing	A creature resembling a pink hang glider with orange wings. Yoshi can use it to glide through the air.	26	38	Whooshwing Habitat	Survive the Risky Skies
Goonie	Seagulls with short, round bodies and long wings that can carry Yoshi.	23	33	Goonie Habitat	Survive the Risky Skies
Flightless Goonie	Goonies that lost their wings and scatter about aimlessly on the ground.	–	–	Goonie Habitat	Survive the Risky Skies
Huffin Puffin	A bird-like creature that usually has babies following it.	29	38	Huffin Puffin Habitat	Sneaky Hide and Seek
Jetty Jelly	A jellyfish-like creature that Yoshi can use to propel through the air with jets of water.	30	39	Jetty Jelly Habitat	Seaside Speed Rankings
Lunge Fish	A large fish that attempts to eat Yoshi. Once in its mouth, Yoshi can control its movement.	28	36	Lunge Fish Habitat	Magnified Lunge Fish
Jam Guy	Shy Guys that play different instruments in unison.	22	33	Jam Guy Habitat	Merry Music Festival
Bewilder Bird	A bird creature that can transform into other creatures.	13	16		Crazee Dayzee
Tumball	A pillbug-like creature that curls up into a ball and Yoshi can roll around on it.	30	38	Tumball Nest	All-Terrain Race
Wiggaline	A long worm-like creature that Yoshi can pull out of its hole by the hand on its head.	30	41	Wiggaline Habitat
Goopsie	An orange goo-like creature that can cling to ceilings while being carried by Yoshi.	24	31	Goopsie Habitat
Underbit	A fish- or shark-like creature that digs through dirt by eating it.	31	42	Underbit Habitat	All-Terrain Race
Billeau	A gaseous cloud creature that extends itself to follow Yoshi.	24	31	Billeau Habitat	A Perilous Passage
Crudwurm	A bipedal, skeletal creature that burrows underground and covers its body in dirt.	11	16	Crudwurm Domain
Piranha Plant	A Venus flytrap-like creature that bites at other creatures.	24	32	Piranha Plant Habitat	A Perilous Passage
Nipper Spore	A floating spore that spawns a Nipper Plant after landing.	–	–	Piranha Plant Habitat	A Perilous Passage
Nipper Plant	A juvenile Piranha Plant that moves around and nips at other creatures.	–	–	Piranha Plant Habitat	A Perilous Passage
Queen Piranha Plant	A larger, spiked form Piranha Plants take after eating enough creatures, they can produce Nipper Spores.	–	–	Piranha Plant Habitat	A Perilous Passage
Bounseed	A bouncy ball-like seed that Yoshi can use to bounce high.	28	37	Bounseed Habitat	Sneaky Hide and Seek
Wash Squash	A small green creature with a spout-like mouth that can shoot water.	31	39	Wash Squash Habitat	Merry Music Festival
Grab-Grass	A leaf-like creature that pursues after Yoshi to pull him into its den.	24	32	Grab-Grass Nest	Flee from the Leaf
Spincone	A top-like creature that Yoshi can ride or hit to send spinning.	31	40	Spincone Habitat	All-Terrain Race
Gobbobble	A large worm-like creature that stores any objects or creatures it eats inside transparent colored eggs.	16	24	Gobbobble Nest
Upshoot	A small burrowing creature that pops in and out of the ground.	25	31		Sneaky Hide and Seek
Hufungous	A mushroom-like creature that can be used as a platform and ascends upward when stood on.	21	28	Crazee Dayzee Habitat	Hop or Drop
Springhopper	A spring-shaped grasshopper creature that can interlock with other members of its species to increase its jump height.	31	39	Peckadee Nest	Hop or Drop
Lunge Fish (small)	A juvenile Lunge Fish, hatching inside an adult Lunge Fish.	26	37	Magnified Lunge Fish
Blorp	A blob creature that can merge with other Blorps to create new Blorps with different traits.	25	34	Blorp Habitat	Crazee Dayzee (Bewilder Bird disguise)
Raven	Large, flightless birds that Yoshi can ride to walk around on small planetoids.	28	36	Raven Habitat
Mini-Raven	Smaller Ravens that follow Yoshi if caught.	–	–	Raven Habitat
Cuttlefwoosh	A balloon-like creature that Yoshi can stand on to propel through the air.	30	40	Cuttlefwoosh Habitat
Eleedee	A colorful octopus-like creature that lights up and conducts electricity when Yoshi touches it.	22	28	Eleedee Habitat	Merry Music Festival
Yu Ef Oh	A flying saucer-like creature that draws other creatures and objects into itself with a glowing beam of light.	33	43	Hauger Habitat	Yu Ef Oh Base
Crazee Dayzee (moon)	A gigantic, full-grown Crazee Dayzee tree reaching outer space, appearing as a moon.	4	6	Crazee Dayzee

Common Bugs

Creature	Description	First appearance	Last appearance
Butterflies	Common insects that come in many colors. They often fly in swarms.		Yu Ef Oh Base
Golden Bugs	They drop tokens in self-defense when hit with an egg or similar force. Found in many areas.		Yu Ef Oh Base
High-Speed Bugs	They fly too fast to track with the naked eye. Native to jungle environments.	Stickiwick Habitat
Neon Bugs	Bugs that shine in the dark. They fly in swarms of different shapes to protect themselves.		Twilight Bug Catching

Underground Critters

Creature	Description	First appearance	Last appearance
Pebble Bugs	Small bugs that prefer to live underground. Their outer shells are as tough as rocks.	Hauger Habitat	Crazee Dayzee
Super-Spicy Bugs	Made of organic components that are similar to those of hot peppers.		All-Terrain Race
Golden-Bug Larvae	Their larvae live in the ground and don't emerge until they grow wings.	Underbit Habitat
Moles	Highly territorial creatures that guard the underground areas they call home. Fond of super-spicy bugs.	Underbit Habitat
Jewel Bugs	Their diet of underground minerals makes their shells grow as hard as jewels.	Hauger Habitat

Common Fish

Creature	Description	First appearance	Last appearance
Small Fish	Dimunitive fish with many different shapes and colors.	Thudd Domain (red) Casterway Habitat (blue) Snurfboard Habitat (pink)	Cuttlefwoosh Habitat (red, blue)
Beautiful Fish	They boast beautiful colors that serve as camouflage in bright, sunlit waters.	Casterway Habitat	Cuttlefwoosh Habitat
Large Fish	Surprisingly poor swimmers. Sometimes they even get stuck in rocky corners.	Casterway Habitat
Fast Fish	They move quickly in the water and can prove hard to catch.	Casterway Habitat
Whopper	Larger thanks to longer lives. Found lurking under rocks.	Casterway Habitat

Other creatures

Creature	Description	First appearance	Last appearance
Alien	An extraterrestrial that can be rescued from an escape pod.	Yu Ef Oh Base
Bomber Bill	A giant, scowling Bullet Bill summoned by Kamek.	Wooshwing Habitat
Bullet Bill	A large missile shaped like a bullet summoned by Kamek.	Wooshwing Habitat
Egg Flower	Flowers that produce Yoshi Eggs.	Scatterpuff Habitat
Plant	Green plants that bloom into large, dancing flowers by listening to music. While growing, they produce large green leaves that serve as platforms.	Weewoo Habitat
Small Bird	A small yellow bird found by the seaside.	Weewoo Habitat

Items and objects

Item	Description
! Switches	Switches that activate different effects.
Apples	Sweet fruits that grow naturally on trees. Typically causes creatures to become revitalized when eaten.
Balloon plants
Boulders	Large rocks in various sizes. They can be weakened by dandelions growing on them, which allows Yoshi to destroy them.
Bubbles	Large bubbles created by Glubbits. They float around and can trap Yoshi inside them.
Campfire	Campfire that can have different effects on creatures.
Crates	Objects that can be broken by Pounding The Ground on them. They release Tokens or Eggs.
Empty Cans	Metallic rubbish found on the ground, suitable for several purposes.
Glow Vines	Blue lightbulb-like vines first found in the Swirm Habitat. They will light up if struck with electricity.
Hard Seeds	Peach-like fruits containing a single large, corkscrew-like seed.
Heart Turnips	Pink, heart-shaped turnips found in the ground. Typically charms creatures and makes them friendly when eaten.
Honey	Bodies of honey. If Yoshi or any other creature fall into honey, they will be covered in it.
Hot Peppers	Red, spicy fruits that grow from brown vines. Typically causes creatures to become angered or surprised when eaten.
Keys	Keys needed to open the temple exit in the Behedger Habitat. In the Yu Ef Oh Base, a silver key is required to free a group of Shy Guys.
Magnet	A red magnet found in the Casterway Habitat. When used with a Casterway, it can catch empty cans at the bottom of the water.
Mud	Bodies of mud, which has different effects on creatures. If Yoshi or any other creature fall into mud, they will be covered in it.
Note Flowers	Flowers in an area that bloom when Yoshi interacts to play a tune by hitting the notes.
Note Fruits	Music note-shaped fruits that grow from vines shaped like musical staffs.
Nuts	Large spherical nuts that grow naturally on trees. Yoshi and other creatures can ride them.
Pink Pool	Bodies of pink liquid from which Mildes spawn. If Yoshi or any other creature sink into a pink pool, they will be engulfed by an emerging Hefty Milde.
Smiley Flowers	Smiling flowers that are hidden in each stage. After clearing Chapter 6, the player can trade five Smiley Flowers to receive a new Exploration Tool.
Targets	A section of a log shaped like a target.
Tokens	Small golden coins shaped like various glyphs. A large square token are worth 10 regular tokens.
Blue Tokens	Blue glyph-shaped coins which appear after hitting a ! Switch. Collecting all Blue Tokens before time runs out rewards the player with a Smiley Flower.
Water	Bodies of water, which can move in waves.
Watermelons	Large fruits that give Yoshi and certain creatures the ability to spit seeds after being eaten. Seeds that Yoshi spits into patches of dirt will instantly grow into more watermelons.
Winged Clouds	Clouds that trigger events when a Yoshi Egg is thrown at them
Yoshi Eggs	Eggs that can be used as projectiles and can be obtained from eating enemies or from an Egg Plant. Only six eggs can be carried at one time.

Quotes

Main article: List of Yoshi and the Mysterious Book quotes

Development

The clay models of the creatures used during development.

During the production of The Super Mario Galaxy Movie, the decision to include Yoshi in the film led to the development of a new Yoshi game. Takashi Tezuka, the producer of the Yoshi series, was involved in the initial phase of development. However, due to his involvement as producer in the development of Super Mario Bros. Wonder, he had to step away from the project. Hisashi Nogami then took over as producer, with returning staff from Good-Feel, the developers of the previous installment in the series, Yoshi's Crafted World, leading the development. Yoshi and the Mysterious Book was originally developed for Nintendo Switch, but development moved to Nintendo Switch 2. The development team made clay models to create the creatures, although the creature-naming system was complex to implement; a team member insisted on it. The aspect creation of Mr. E was materialized towards the end of development.

Staff

Main article: List of Yoshi and the Mysterious Book staff

Yoshi and the Mysterious Book was developed by Good-Feel, with supervision from Nintendo. The returning staff from the previous installment in the series, Yoshi's Crafted World, include Masahiro Yamamoto as director, game design led by Hokuto Hayashihara, programming by Hironori Kuraoka, and art by Ayano Otsuka. The game's soundtrack was managed at COLIBRI and composed by Kumi Tanioka. Kentaro Sei, Takashi Tezuka, and Hisashi Nogami serve as the game's producers.

Update history

This is a detailed list of updates Yoshi and the Mysterious Book has received since its launch.

Ver. 1.0.1

The first update was released on June 9, 2026. The following release notes were provided:

Fixed Issue

• Fixed an issue where players were unable to leave the Index page after receiving an explanation about it.

Ver. 1.0.2

An update was released on July 8, 2026. The following release notes were provided:

General updates

• It's now possible to carry over save data from the demo version of Yoshi and the Mysterious Book. You can carry over save data from the demo version by starting up the full retail version (without any save data) of the game.
  • Please launch the full retail version of the game after updating to the latest version.
• Other issues were fixed to improve the gameplay experience.

Reception

Reviews
Release	Reviewer, Publication	Score	Comment
Nintendo Switch 2	Steve Watts, GameSpot	7/10	"Yoshi and the Mysterious Book is fundamentally a game about poking and prodding at the world and seeing what happens. It won’t test your precision platforming skills, but it serves as a gentle introduction for novices, and an experiment for even experienced gamers to see an audacious, expanded idea of what a platformer can be."
Nintendo Switch 2	Giovanni Colantonio, Polygon	N/A	"My instinct is to say that I hope to see these ideas fully realized in a more traditional Yoshi game, but I'm not sure if that would be the right solution. Turn Yoshi and the Mysterious Book into a proper platformer where you need to use creatures' powers to solve your way through levels, and you basically have a Kirby game. What makes this unique is how contained it is, even if that's what holds it back too. It's as if you’ve been tossed into the whimsical playtesting lab Nintendo uses to poke and prod at every creature it designs for a new game — more of an extension of Super Mario Maker's creative freedom than Super Mario Bros. Wonder's meticulously designed platforming. If anything, a sequel could stand to drop the level-based structure entirely in favor of a true sandbox full of critters to be experimented on. The idea never fully hatches, but I can appreciate the playful concept it’s flutter-jumping towards with great effort. It doesn’t capture that timeless joy of experiencing World 1-1 for the first time, but it at least helps you understand how Nintendo engineers those magical moments."
Nintendo Switch 2	Tom Marks, IGN	6/10	Yoshi and the Mysterious Book is an undeniable delight, with adorable storybook creatures that are amusing to learn about in your first, surprise-filled encounters with them. But while there's impressive variety on display, it comes at the cost of depth. Nearly all of its best ideas are left to wilt on the vine – especially one clever mechanic that could have supported an entire game on its own, but instead arrives far too late and then disappointingly disappears. Its open-ended levels certainly had me smiling, but only on my initial run through them, and the long list of potential Discoveries offers too few moments to take what you've learned and think creatively to solve a problem. That’s a significant weakness for a game that's all about experimentation. The result is the most charming video game bubble wrap you'll ever pop, and not much more.
Aggregators
Compiler		Platform / Score
Metacritic		80

Descriptions

Nintendo Today!

The Super Mario Galaxy Movie Collectible Cards

• Featured Game Title:
  • English:
    A mysterious talking book named Mr. E has crash-landed on Yoshi's island! Help Yoshi learn what's inside Mr. E's pages by diving into the book, investigating unusual creatures in their habitats, and making discoveries.
  • Other languages:
    • Japanese:
      空から降ってきた、しゃべる図鑑「フカシギ」と出会ったヨッシーが、ふしぎな生き物たちが生息するこの図鑑の世界に入って探索をすることに。図鑑の中の生き物を調査し、いろいろな発見をすることで図鑑を完成させていく。
    • Chinese (Traditional):
      耀西遇到了從天而降，會說話的圖鑑——「簿可思易」。他決定進入這個奇妙生物棲息的圖鑑世界探索一番。調查圖鑑裡的生物，找到不同的新發現，完成圖鑑吧。
    • Dutch:
      Op Yoshi's eiland is een mysterieus boek genaamd graaf Goedboeck uit de lucht komen vallen! Duik als Yoshi in graaf Goedboecks pagina's om opmerkelijke wezens in hun natuurlijke leefomgeving te onderzoeken, en allerlei ontdekkingen te doen.
    • French (Europe):
      Un livre parlant du nom de Mysterius est tombé du ciel et a atterri sur l'île de Yoshi ! Plongez au cœur de ses pages et aidez Yoshi à faire toutes sortes de découvertes sur les créatures qui s'y trouvent, leur habitat, et plus encore.
    • German:
      Ein mysteriöses Buch namens Enzo ist auf Yoshis Eiland herabgefallen! Um herauszufinden, was auf Enzos Seiten steht, taucht Yoshi in das Buch ein, untersucht ungewöhnliche Kreaturen in ihren Lebensräumen und macht dabei einige interessante Entdeckungen.
    • Italian:
      Un libro parlante chiamato N. Ciclopedio si è schiantato sull'isola di Yoshi. Aiuta Yoshi a scoprire cosa si cela nelle sue pagine aprendolo, indagando sulle strane creature e i loro habitat al suo interno e facendo scoperte.
    • Korean:
      하늘에서 내려온 말하는 도감 「신기한」과 만난 요시는, 신비한 생물들이 서식하는 이 도감의 세계로 들어가 탐색을 하게 된다. 도감 속 생물들을 조사하고 다양한 발견을 하며 도감을 완성해 간다.
    • Portuguese (Brazil):
      Um livro falante e enigmático chamado Professor N. Igma caiu de paraquedas na Ilha do Yoshi! Ajude o Yoshi a desvendar o que há dentro do Professor N. Igma ao mergulhar de cabeça nesse livro, investigar as criaturas incomuns nos seus habitats e fazendo descobertas.
    • Spanish (Latin America):
      ¡Un misterioso libro llamado Prof. Leo aterrizó de emergencia en la Isla de Yoshi! Ayuda a que Yoshi explore el interior del Prof. Leo al sumergirte en sus páginas, investigar criaturas inusuales en sus hábitats y realizar hallazgos.
    • Spanish (Europe):
      Un misterioso libro parlante, el Profesor Leo, ha caído súbitamente del cielo ¡y ha aterrizado en la isla donde viven Yoshi y sus amigos! Ayuda a Yoshi a averiguar qué está escrito en las páginas del libro, introduciéndote en ellas para investigar a peculiares seres en su hábitat natural y llevar a cabo todo tipo de descubrimientos.

Gallery

For this subject's image gallery, see Gallery:Yoshi and the Mysterious Book.

• 

  International logo

• 

  American/Latin American box art

• 

  Yoshi

• 

  Mr. E

References to other games

Super Mario World 2: Yoshi's Island

• In the Jam Guy Habitat, Jam Guys perform "Flower Field BGM" as their second song. Likewise, in the Merry Music Festival, they play the "Athletic BGM".
• Ravens appear on the Moon similarily to Raphael the Raven from this game.

Yoshi's Story

• Goonies make "Ah-ho!" noises, last heard in this game.
• In Merry Music Festival, when the level switches to night-time, Jam Guys can perform a new arrangement of Yoshi's Song.

Yoshi's Island DS

• Nipper Plants sport their eyeless design from this game.

Super Mario Galaxy 2

• After eating a Pepper, Yoshi can briefly run on water similarily to Dash Yoshi from this game.

Mario Party 10

• While fighting against Kamek in the Wooshwing Habitat, he summons Bullet Bills and Bomber Bills just like in the boss minigame Kamek's Rocket Rampage.

Yoshi's Crafted World

• The music that plays during the opening cutscene references Baby Bowser's leitmotif from this game.

References in other games

Tetris 99

• A theme based on Yoshi and the Mysterious Book was made available during the 54th Maximus Cup.

Names in other languages

Language	Name	Meaning	Note(s)	Ref.
Japanese	ヨッシーとフカシギの図鑑 Yosshī to Fukashigi no Zukan	Yoshi and the Mysterious Field Guide/Yoshi and Mr. E's Field Guide
Arabic	يوشي آند ذا مستيريوس بوك Yushi and dha Mistiryus Buk	Yoshi and the Mysterious Book
Chinese (Simplified)	耀西与不可思议的图鉴 Yàoxī yǔ Bùkěsīyì de Tújiàn (Mandarin) Yiuhsāi yúh Bāthósīyíh dīk Tòuhgam (Cantonese)	Yoshi and the Unfathomable Field Guide
Chinese (Traditional)	耀西與不可思議的圖鑑 Yàoxī yǔ Bùkěsīyì de Tújiàn (Mandarin) Yiuhsāi yúh Bāthósīyíh dīk Tòuhgam (Cantonese)	Yoshi and the Unfathomable Field Guide
Korean	요시와 신기한 도감 Yosi-wa Sin'gihan Dogam	Yoshi and the Mysterious Field Guide

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