1. First Pink Coin
Move forward and hop on the series of Dash Back buttons to get up on platform behind you and that has a mushroom resting on it.
After that, move forward and get on the monkey bars and then drop to the platform where you see the first Pink Coin.
2. Second Pink Coin
After getting the first Pink Coin, take the lower platforms.
Then hop onto latch to the monkey bars to get the second Pink Coin.
3. Third Pink Coin
After exiting the lower platform where the second Pink Coin, cross the bridge and then hop on the Dash Back buttons to get on the platform above.
After that, latch on the monkey bars above and then drop to the platform where the third Pink Coin is waiting with another set of Gold Coins.
4. Fourth Pink Coin
Just like the previous coins, hop on Dash Back buttons to get on a platform.
Then latch onto a row of monkey bars on top and then drop to a platform where the fourth Pink Coin is staying. There are two Gold Coins surrounding the fourth Pink Coin too.
5. Fifth Pink Coin
Make a wall jump against two walls where a flying flame ball is moving.
And then latch onto the row of monkey bars and then drop to where the platform where the fifth Pink Coin is waiting.