1. First Pink Coin
Move up and snatch the key in the middle. Make use of the Back Dash Buttons to jump on the Boo from the left in order to get the first Pink Coin.
After getting the first Pink Coin, enter the Green Door at the bottom.
2. Second Pink Coin
After exiting from the first Green Door, hop on the springboard and walk to the other end of the stage by walking straight to the right. Then climb on the other two springboards. On the second springboard, climb up on the platform to get the second Pink Coin.
3. Third Pink Coin
As soon as you get the second Pink Coin, walk straight through the right side of the panel to exit to the left and make a high jump to get the third Pink Coin that’s on top of a column of Gold Coins.
After that, make a back jump using the two Back Dash Buttons to jump underneath the two Surprise Question Block that’s right on top of it in order to get the key.
Once you have the key, enter the Green Door below.
4. Fourth Pink Coin
After exiting the Green Door, move up until the highest part and snatch the fourth Pink Coin that’s floating above with a few Gold Coins around it.
5. Fifth Pink Coin
Right after getting the fourth Pink Coin, hop on the Back Dash Buttons to jump on the Boo from the left. Doing this will drop a key.
Once you have the key, step on the Back Dash buttons again and jump on another Boo that is flying toward you from the left in order to get the fifth Pink Coin.