This page offers a guide on grabbing the Secret Shine Sprite in Episode 4 of Sirena Beach. This area is accessed via the pipe on the roof of the house at the Plaza Square once you’ve cleared Episode 4 of Pinna Park and defeated Shadow Mario back in Delfino Plaza.
Collect the Red Coins
A return to Episode 4: The Secret of Casino Delfino is in order for this Secret Shine. Make your way back into the Casino and play the minigames to unlock the pipe behind the picture of the Shine once more.
Back in the secret course here, you’ll have your FLUDD this time and as soon as you enter, you’ll spot the large red button begging for a Ground Pound. Begin by collecting the 1st Red coin in the center of your initial platform and then use the first rotating cube, taking care to jump and collect the 2nd Red coin as you make your way across to the other side.
Once again, you’ll find the 3rd Red coin in the middle of this platform, collect it and then jump to the next rotating cube, remembering to collect the 4th as it makes its way across. The first wooden beam contains the 5th Red coin, make use of a Side Somersault to gain the necessary height and then do the same for the 6th and 7th Red coins on the next beams.
The 8th and final Red coin is found on the next rotating wooden beam, this can be tricky to collect as you’ll need to carefully use a Side Somersault to get the height needed without falling off. Collect this and then make it to the end to collect another Shine.