Coin

As the name implies, these are coins made out of gold. They are found all over the Mushroom Kingdom. In the country of BeanBean Land, they are known as Mushroom Coins and are worth far less than BeanBean Coins. 100 Gold Coins can be traded in for an extra life.

In Super Mario 64, 100 of these babies will grant Mario a Power Star.

In Super Mario Sunshine, 100 will grant Mario a Shine Sprite.