Muddy Coin

A Muddy Coin is an object in Dr. Mario World. Introduced in World 28, they are cyan coins with the image of a virus imprinted on it and are covered in mud. The coins may be covered by a different amount of mud, and when eliminated either by nearby objects or directly, some of the mud will be removed. Smaller coins require up to two hits to remove all the mud, medium coins require up to four hits to remove all the mud, while the larger coins require up to six hits to remove all the mud. Doctor skills that can fully eliminate objects that requires multiple matches will only remove one layer of mud from these coins. Dr. Baby Wario's skill is the only one that can collect these coins when targeted, regardless of how much mud are on them. These only appear in stage mode.

In-game description

 * "Eliminate nearby objects to clean the coin. Once it's all cleaned up, it's yours!"