Smiley Flower

Smiley Flowers, also referred to as Special Flowers, Flower Men, or simply flowers,  are plant items that appear in Super Mario World 2: Yoshi's Island, Yoshi's Island DS, Yoshi's New Island, Yoshi's Woolly World, Poochy & Yoshi's Woolly World, and Yoshi's Crafted World. Their role is comparable to Dragon Coins and Star Coins. There are also evil smirking versions known as Fooly Flowers that attempt to trick the Yoshi into coming near them. After that, they roll into them.

The health meters in Yoshi's Story, Yoshi Topsy-Turvy, Yoshi's Woolly World, Poochy & Yoshi's Woolly World and Yoshi's Crafted World are also represented by a smiling flower, which gets sadder and loses petals as the player takes more damage. This flower is called the Smile Meter (or Smilometer) in Yoshi's Story, or otherwise, simply the Health Meter.

Super Mario World 2: Yoshi's Island
In the first entry in the Yoshi's Island series of games, there are five Special Flowers in each level, and netting all five earns the Yoshi an extra life and fifty points toward the completion score (10 points per flower). Getting all the flowers in each level is also necessary for the Yoshi to get a perfect score. Collecting at least one flower is also necessary to access a Bonus Challenge via the Goal Ring, and the chance of playing a Bonus Challenge is increased by collecting more. Flowers appear as sleeping seeds if frozen or not collected at the end of a level.

Yoshi's Island DS
Flowers also appear in Yoshi's Island DS, functioning the same way as in the game's predecessor.

Yoshi's New Island
Smiley Flowers return in Yoshi's New Island under their current name, functioning the same way as in the game's predecessor. However, as there are no score features or Bonus Challenges in this title, collecting all five increases the chances of getting Egg Medals via the Goal Ring.

Yoshi's Woolly World / Poochy & Yoshi's Woolly World
Smiley Flowers reappear in Yoshi's Woolly World and Poochy & Yoshi's Woolly World, acting the same as in previous games. However, collecting all five does not give players an extra life due to the lack of the extra life system. If Yoshi manages to collect all Smiley Flowers from a world, an additional level is unlocked in that world. If all Smiley Flowers are collected from all other levels, a special level in a special world is unlocked, called Wonderful World of Wool. The Smiley Flower at the Goal Ring will give Yoshi a chance to play a Bonus Game for extra beads.

Yoshi's Crafted World
Smiley Flowers return in Yoshi's Crafted World, and like in Yoshi's Woolly World, they do not grant extra lives due to the lack of the extra life system. The player also earns additional Smiley Flowers in a level for collecting a set number of coins, collecting all Red Coins, getting full hearts, finding the Poochy Pups, finding them within a set time, and finding all of the souvenirs. In levels such as Go-Go Yoshi and Monty-Mole-B-Gone, Smiley Flowers can also be obtained by completing various objectives. Yoshi must also give Blockafellers certain amounts of Smiley Flowers to advance to certain levels. Unlike previous games, they do not give the player a chance to play a Bonus Game. Unlike previous games, there are varying amounts of Smiley Flowers per level (between 5 and 8). Fooly Flowers also make a reappearance. In this game, they simply disappear when hit.

Mario Kart: Double Dash!!
In Mario Kart: Double Dash!!, Flowers appear as emblems on the the Goo-Goo Buggy and the Rattle Buggy.

Super Smash Bros. series
Two flowers with open mouths appear in the foreground of the summer transition of the Yoshi's Island stage, first appearing in Super Smash Bros. Brawl and later appearing in Super Smash Bros. for Nintendo 3DS and Super Smash Bros. Ultimate.

Other appearances
Special Flowers were originally planned to appear as collectibles in Yoshi's Story as seen in early screenshots, but were ultimately removed.

The Wii U version of  received a DLC level titled "Yoshi's Island Zone"; it contains many Yoshi franchise references. Among these is the Red Rings from Sonic Lost World being replaced by Smiley Flowers.

A Smiley Flower appears in Super Nintendo World in the queue for Yoshi's Adventure, using its Yoshi's New Island appearance.

Yoshi's Island: Super Mario Advance 3

 * Nintendo 3DS Digital Manual bio: "There are five within each stage. Collect them all to gain an extra life."

Yoshi's Woolly World

 * Instruction Manual bio: "There are five in each course--the more you collect, the better your chances are of getting a Bonus Game."
 * "If you collect all of them in a world, something good might happen..."

Poochy & Yoshi's Woolly World

 * Instruction Manual bio: "There are five in each course. The more you collect, the better your chances are of getting to play Gold Rush."
 * "If you collect all of them in a world, something good might happen..."

Yoshi's Crafted World

 * North American website bio: "You'll have to explore far and wide to collect all Smiley Flowers hidden on each stage."