Dash Coins are Coins in New Super Mario Bros. Wii. They are rare. When you see Dash Coins they appear as transparent circles. You might think you should leave them alone. BUT, there is a mystery of the Dash Coins. Go through the transparent circles. They will become real and regular Coins! You don't really have to go through Dash Coins, to turn them into coins. Thrown enemies (in ice blocks) can turn them into coins as well.