1. First Black Coin
As the stage begins, continue running and jump on the second Buzzy Beetle you’ll see crawling over a row of Munchers. Jumping on the Buzzy Beetle will allow its shell to slide forward to get the first Black Coin.
2. Second Black Coin
Once Mario moves forward, he will see a pair of brick rows sitting above each other. The first row above has a pair of Surprise Question Blocks, while the second row of bricks only has one Surprise Question Block. Underneath these blocks is the second Black Coin.
3. Third Black Coin
Right after getting the second Black Coin, you will enter a pipe. As soon as you exit this pipe, you will make quite a big drop in order to get the third Black Coin.
4. Fourth Black Coin
Continue running forward until you come across a row of Back Dash Buttons, with a single Back Dash button floating above it. Above all these is the fourth Black Coin.
To be able to get the fourth Black Coin, hop on the Buzzy Beetle below and then make a quick “wall” jump on the single Back Dash button.
5. Fifth Black Coin
Getting the last Black Coin in this stage involves skipping the Switch Button that comes before a row of Munchers. Then as you make your way, drop and jump on the Buzzy Beetle below as soon as it crawls under the fifth Black Coin so you would be able to get the last Black Coin.