D-Coins or dimensional coins are a special kind of coin that is found in the Fourth Dimension and was introduced in Into the Fourth Dimension. These coins take the place of Yoshi coins from Super Mario Star Road and have the value of only 2 coins just like them. In the series, they are considerably similar to D-Stars as regular Coins are to regular Power Stars, and are considered important, despite their low value. The more of them Mario and his friends take them, the more Dimentio grows weaker.
These coins can be found in: