This page offers a guide on how to get the Shine Sprite in Episode 2 of Bianco Hills.
Journey to the Top of the Mill
The goal of this level is to make your way to the top of the windmill to fight Petey Piranha. To do so, make your way along the brick path towards the town and use the rope or hover over the river. Then, follow the red arrow sign to the right and make your way along the path towards the hill up to the windmill. There’s a lot of graffiti goo that you’ll need to clear away using FLUDD too. When you come to the bridge atop the hill, you’ll need to hover over it as parts of the bridge are broken.
When you reach the windmill, begin making your way up and along it. At some points, you’ll need to use the hover nozzles to make your way across large gaps in the ramp. There’s also some vines covering the path that you’ll need to navigate around using the hover function.
Once you’re at the top of the windmill, you’ll need to jump onto one of the windmill’s rotating platform and ride it up until its aligned with the roof, then hover over to Petey Piranha on the roof.
Petey Piranha Boss Fight
When you reach the top of the roof, the roof will actually collapse inwards, and you and Petey Piranha will fall into the windmill where you’ll need to fight him to get a Shine Sprite.
He will periodically open his mouth and spit out graffiti goo at the ground. Occasionally, enemies will spawn in the goo, as well as water bottles that you can use to replenish your FLUDD tank. In the couple of seconds where his mouth is open and he’s about to spit, you need to shoot water into his mouth to fill his belly up with water. When you do this, he will fall to the ground and you’ll need to run over and groundpound on his stomach to damage him. Do this three times to defeat him! When you defeat him, a Shine Sprite will appear.