1. First Pink Coin
As you move forward as soon as the stage opens, make a high jump before you see a tall Pokey.
2. Second Pink Coin
Make your way to another bridge. Then once you see another Pokey standing on a moving platform, grab the second Pink Coin on the bridge.
3. Third Pink Coin
To get the third Pink Coin, hop into a cannon then tap on it once it facing up diagonally. As soon as Mario ejects from the cannon, he will already be able to get the third Pink Coin.
4. Fourth Pink Coin
Upon getting on moving platforms with Pokeys riding on it, make a high jump before jumping over the last Pokey on the moving platform.
5. Fifth Pink Coin
To get the fifth Pink Coin, continue moving forward until you find several rows of bridge on top of each other. The fifth Pink Coin will be in the middle area and between two Gold Coins.