Bonus Coin (Super Mario World)

A Bonus Coin is a special and rare coin that appears in Super Mario World. It is a normal yellow coin with a slightly rounder shape and a smiley face on it. Bonus Coins are dropped by Yoshi Clouds.

Super Mario World
In Super Mario World and its reissue, a Yoshi Cloud drops ten Bonus Coins, one at a time, after which it flies away. If Mario or Luigi manages to collect all ten coins before they faze through the ground after bouncing once on it, the Yoshi Cloud will reward him with a 1-Up Mushroom.

If Mario or Luigi abandons Yoshi and flies one screen above the Yoshi Cloud, a glitch will cause the Bonus Coins to appear as if they were doubled.

In an early version of Super Mario World, the Bonus Coins were originally designed with a star on each. This appearance would later be used for the coins in Super Mario 64.

Super Mario-kun
In chapter 8 of volume 2 in Super Mario-kun, while fighting a Jumping Pumpkin Plant, Mario falls on Yoshi, making him pop out an egg that releases a Yoshi Cloud. Mario jumps on it and eats the Bonus Coins, becoming the big-headed Nikoniko Mario, scaring off the enemy.