This is a hidden episode found by re-entering Episode 8: Fluff Festival Coin Hunt in Pianta Village.
Climb to the Top of the Giant Palm Tree
First off, head onto the roof of the building near the pond. Then, walk all the way to the furthest edge of the roof and then jump and hover over to the purple platform on the palm tree. Continue heading up the purple platforms until you reach the last one where you can grab a rocket nozzle. Use the rocket to jump up to the cloud platforms above and then up onto the palm tree where you’ll find the wooden platform with a Shine symbol on it. Hop up onto the wooden platform and look up at the sun. Then, you’ll need to shoot water directly at the sun in order to reveal a Shine Sprite sticker. When the Shine Sprite sticker is revealed completely, a real Shine Sprite will spawn.