Yoshi's Woolly World

Yoshi's Woolly World (originally called Yarn Yoshi) is a 2.5D side-scrolling game for the Wii U by Good-Feel. It is the second title in the Adventures of Yoshi series and the first Yoshi home console game since Yoshi's Story. The game takes place in a handcrafted universe, similar to the one in Kirby's Epic Yarn, which was also developed by Good-Feel. It follows the adventure of a Yoshi tribe trying to pursue and defeat the evil wizard Kamek, who unwove their fellows and scattered their materials across six worlds.

Like with most other Nintendo 3DS and Wii U software titles, this title can be purchased at retail stores or from the Nintendo eShop. The digital version requires 7991.8 MB (approx. 7.8 GB) of memory to be installed. Due to the software's size, standard set Wii U consoles cannot download it without an external storage device, but Deluxe Wii U consoles are able to.

A port of this game titled Poochy & Yoshi's Woolly World was released for Nintendo 3DS in 2017.

As of November 7, 2017, the Miiverse service was terminated by Nintendo, which renders this game's Miiverse stamps unusable.

Story
The game takes place in Craft Island. Kamek turns the Baby Yoshis made of yarn into Wonder Wool, but misses two of them, who have to save the rest.

Gameplay
Yoshi's Woolly World is a platform game with textile and fabric environment which plays similarly to Super Mario World 2: Yoshi's Island, Yoshi's Story, and Yoshi's New Island, with many features coming from these games. With their extensible tongue, Baby Yoshis are able to abduct enemies into his mouth and either eat them or spit them out as projectiles; however, instead of turning them into Yoshi Eggs as in earlier games, he turns them into yarn balls, which can be thrown just like eggs. They can also be thrown at objects such as platforms and Warp Pipes made of strings and needles in order to make them solid. Smiley Flowers and Winged Clouds return and coins are replaced by beads. Each level contains 20 "Stamp Patches" hidden inside common-looking beads, similarly to the Red Coins found in Yoshi's Island games. Collecting a number of Stamp Patches grants the player a set of Stamps. The hit point system returns from Yoshi's Story. As the Yoshis are attacked by enemies, their Health Meter decreases and can be replenished with Hearts.

The game features two options for standard gameplay. The first is "Classic Mode", which is the standard gameplay similar to previous Yoshi platforming games. The second mode is "Mellow Mode". In this mode, Yoshi is Winged Yoshi and players can fly around freely, providing an easier experience. Players can switch between the two modes at any time via the pause menu.

The game spans six worlds, as well as a main hub area. Similarly to Super Mario 3D World, the player is able to roam freely between the levels on the world map without being restricted to walking along set paths.

Cooperative
In co-op mode, the players control two Baby Yoshis, Green Yoshi and Red Yoshi. A Yoshi is able to eat their partner and either swallow them to use them as a yarn ball or spit them out to destroy obstacles. However, when a Yoshi eats their partner, the Yoshi getting eaten loses all of their yarn balls. If one of the Baby Yoshis goes too far off screen it is placed into a flying Yoshi Egg and transported to the other Yoshi. When one of the Baby Yoshis goes down a Warp Pipe the other one is transported with it simultaneously. A Yoshi is able to jump onto another Yoshi and use it as a platform.

amiibo
The game makes use of amiibo, and a series of yarn-made Yoshi amiibo was released alongside the game. When a Yarn Yoshi amiibo is scanned, it will provide a Double Yoshi mode. Double Yoshi mode functions similarly to the Double Mario power-up from Super Mario 3D World, in that both Baby Yoshis follow the single player's inputs, but with the additional functions of co-op mode. Instead, if the normal version of the Yoshi amiibo is scanned, a normal Yoshi copy will appear. Any Yoshi amiibo scanned will also unlock them for the amiibo tent upon completing the level.

In addition to the yarn amiibo, every Mario-related amiibo except Daisy, Waluigi and Boo, every Super Smash Bros. series amiibo except Pokémon and DLC characters, and the Inkling amiibo from the Splatoon series are compatible with the game and will unlock a pattern based on the character. Any other amiibo unlocks a special amiibo Yoshi, a green Yarn Yoshi wearing an amiibo shirt.

Additional playable characters
Many additional playable Yoshi designs can be unlocked by collecting Wonder Wool in the levels or by scanning different amiibo into the game.

Allies

 * Fluffin' Puffin
 * Poochy
 * Egg-Plant

Bosses

 * Big Montgomery (World 1, 3, and 5 Midway Boss)
 * Knot-Wing the Koopa (World 2, 4, and 6 Midway Boss)
 * Burt the Bashful (World 1 Boss)
 * Bunson the Hot Dog (World 2 Boss)
 * Miss Cluck the Insincere (World 3 Boss)
 * Naval Piranha (World 4 Boss)
 * Snifberg the Unfeeling (World 5 Boss)
 * Baby Bowser (World 6 Boss)

Other characters

 * Kamek

Items and objects

 * Yarn Balls
 * ! Switches
 * Beads
 * Chomp Rocks
 * Yarn Baskets
 * Fruit
 * Goal Rings
 * Hearts
 * Number Platforms
 * One-Way Flippers
 * Paddle Wheels
 * Power Badges
 * Present Boxes
 * Smiley Flowers
 * Spring Balls
 * Stamp Patches
 * Transformation Doors
 * Warp Pipes
 * Watermelons
 * Winged Clouds
 * Wonder Wools

Yoshi's Transformations

 * Umbrella Yoshi (World 1-2, World 6-2)
 * Mega Yoshi (World 1-6, World 5-5)
 * Moto Yoshi (World 1-7, World 5-1)
 * Mole Yoshi (World 2-2, World 3-6)
 * Sky Pop Yoshi (World 3-7, World 6-7)
 * Mermaid Yoshi (World 4-3, World 5-2)

Worlds/Courses

 * World 1
 * Yarn Yoshi Takes Shape!
 * Bounceabout Woods
 * Sponge Cave Spelunking
 * Big Montgomery's Fort
 * Knitty-Knotty Windmill Hill
 * Shy But Deadly
 * Clawdaddy Beach
 * Burt the Bashful's Castle
 * Hang Tongue!
 * World 2
 * Across the Fluttering Dunes
 * Duplicitous Delve
 * Walk the Chomp to Unwind
 * Knot-Wing the Koopa's Fort
 * Spiky Stroll
 * Lava Scarves and Red-Hot Blarggs
 * The Desert Pyramid Beckons!
 * Bunson the Hot Dog's Castle
 * Perils of the Perplexing Pyramid
 * World 3
 * Yoshi and Cookies
 * Wobble Mobile Jaunt
 * Scarf-Roll Scamper
 * Big Montgomery's Bubble Fort
 * Fluffin' Puffin Babysitting
 * A-Mazing Post Pounding
 * Fanciful Fluff and Feathers
 * Miss Cluck the Insincere's Castle
 * Woollet Bill's Last Ride
 * World 4
 * Monkeying Round and Round
 * Lakitu Peekaboo
 * Rollin' Down the River
 * Knot-Wing the Koopa's Aqua Fort
 * Sunset at Curtain Falls
 * Spooky Scraps! Don't Get Spooked!
 * Yoshi Branches Out
 * Naval Piranha's Sewer
 * Naval Piranha 2: Now It's Personal!
 * World 5
 * Fluffy Snow, Here We Go!
 * Frozen Solid and Chilled
 * Flying-Carpet Cruise
 * Big Montgomery's Ice Fort
 * A Little Light Snowfall
 * Up Shuttlethread Pass
 * Snowy Mountain Lift Tour
 * Snifberg the Unfeeling's Castle
 * Yoshi's Curtain Call
 * World 6
 * Lair of the Smooch Spiders
 * Snag-Stitch Mountain
 * Vamoose the Lava Sluice!
 * Knot-Wing the Koopa's Sky Fort
 * Yoshi, the Terror of All Boos
 * Feel Fuzzy, Get Clingy
 * Kamek's Last-Ditch Flyby
 * King Bowser's Castle
 * Skeleton Goonies' Lava Lair
 * World ☆-S
 * Wonderful World of Wool

References to other games

 * Super Mario Bros.: Bullet Bill Patches and Koopa Shell Patches greatly resemble their respective original sprites from this game.
 * Super Mario World: Monty Mole Patches resemble their sprite from this game.
 * Yoshi's Cookie: The title of the level Yoshi and Cookies is based on this game's name. Additionally, checkered Yoshi Cookies act as an obstacle in this level.
 * Super Mario World 2: Yoshi's Island: Many elements from this game return, including several bosses: Burt the Bashful and Naval Piranha. The level name "Feel Fuzzy, Get Clingy" is based on the level Touch Fuzzy, Get Dizzy.
 * Super Mario Land: Yoshi has a transformation named for the Sky Pop from this game.
 * Mario Kart 64: Moo Moos, which first appeared in this game in the course Moo Moo Farm, is a pattern unlocked by getting all Wonder Wools in Knitty-Knotty Windmill Hill.
 * Yoshi's Island DS: Bouncies return in one of the possible Bonus Games.
 * Wario Land: Shake It!: Several sound effects are reused. These include the pipe entering and boss damaging sound effects.
 * Yoshi's New Island: Transformation Doors have the same function as the Whirly Gates in this game. Some of Kamek's voice clips are reused as well.

Pre-release and unused content
During levels, the playable character Yoshi started out being made only of some yarn threads in his shape—however, using his tongue, the player could swallow Shy Guys to turn Yoshi into a three-dimensional, amigurumi crochet form.

Trivia

 * Although Yoshi's Woolly World was released in 2015, the 2014 game Super Smash Bros. for Wii U included a stage based upon this game titled Woolly World. On a Miiverse post before the shutdown, it was stated that the stage was put in late in development.
 * This is the only game in the Yoshi series to be released in PAL regions before anywhere else.