1. First Pink Coin
To get the first Pink Coin, hit the Yellow Switch located at the first platform on the right.
Then once the platforms have revealed themselves, jump on the third level and drop to the single brick on the right to get the first Pink Coin.
After getting the first Pink Coin, head for the Green Door at the bottom.
Note: If the door disappears, hit the Yellow Switch again at the bottom.
2. Second Pink Coin
Upon exiting the Green Door, move up to the next platform and exit the platform on the left to get the second Pink Coin.
3. Third Pink Coin
After getting the second Pink Coin, move up to the highest platform to the left. Then use the Pause Button that’s right in front of a P Switch.
Once the Boo flying above you moves a little higher, run toward the P Switch to reveal the third Pink Coin. After getting the Third Pink Coin, enter the green door on the right.
4. Fourth Pink Coin
Upon exiting the green door, move up to the row of bricks with a Surprise Question Block and hit the Yellow Switch on top to reveal the platforms.
Once the red platforms have revealed themselves, head to the fifth level of platforms and snatch the fourth Pink Coin that’s sitting on top of a Gold Coin.
5. Fifth Pink Coin
To get the fifth Pink Coin, just hop on the higher platform to get the fifth Pink Coin.