Yoshi (Series)

The Yoshi series is often seen as a "spinoff" of the Super Mario series of games—and, much like Mario, it features a multitude of different coins throughout its history.

Super Mario World 2: Yoshi's Island
Yoshi's Island features coins that behave very similar to its predecessor, with one key difference: the inclusion of the all new Red Coins. These coins function similarly to Dragon coins or Ace Coins from the Mario series in that they are a special, less common form of coin that are required for 100% completion of the game. Each level has 20 Red Coins which are then tallied at the end of the level along with Flowers and Stars.

Coins in Yoshi's Island have three states: Interestingly, the "disguised" appearance of Red Coins is actually different in the GBA port of the game, Yoshi's Island: Super Mario Advance 3. In the original, they are nearly always distinctly different from yellow coins with a slight orange hue, whereas in the GBA port, they appear as pure yellow, meaning their disguise can no longer be seen through without the use of a powerup. The reason for all of these pigmental discrepancies is unknown, but perhaps it is to subvert the player's expectations and keep them guessing as to what truly is and isn't a Red Coin.
 * The typical "yellow coin" you'd see in any Mario game, with an extra Yoshi flair embedded on it.
 * An "orange coin", which is actually a Red Coin disguising as a normal coin unless it is a coin dropped from an enemy, which are curiously always orange yet not in disguise and simply behave like regular coins.
 * The Red Coin, usually taking the form of an orange coin until picked up, but is able to be seen regardless of disguise with a magnifying glass powerup.

Yoshi's Island DS


Coins and Red Coins function identically to in Yoshi's Island DS to how they did in the original, however there is a new type of coin.

Baby Coins


Baby Coins appear in this game too. There are thirty-nine in the entire game, featuring Baby Mario, Baby Peach, and Baby Donkey Kong on them. There are thirteen of each of these. Collecting every coin in the game unlocks a Hard Mode for each mini-game.

Trivia

 * The coins in Yoshi's Island strongly resemble Dragon Coins from Super Mario World despite having significantly different use. Seeing as how Yoshi's Island is a prequel to Super Mario World, perhaps these are a primitive form of Dragon Coin that have become a rarity in the adult years of Mario's life.
 * The red hue of a Red Coin is probably not caused by them being drenched in blood, as that would be extremely uncharacteristic of a Nintendo game. However, the shiny crimson texture in Yoshi's Island almost appears to suggest some form of wet liquid applied to the surface, which is hopefully just a fresh new coat of paint.