Screenshot of all ball-colors places.

In the Mushroom Beach region, make your way to the Cove Mushroom. You can find the Sweet Sprinkle right of this landmark. Use your grapple hook to ascend and reach the treasure.

This one will be located at the hideout of the Skull Gang. Players will be required to complete a puzzle and retrieve the ball from underwater.

First, push a large boulder into the water and allow it to reach the floor by opening up passages via the pressure switches. Now you will be able to open the gate that leads to the Deadly Sprinkle.

With the egg that is not hatched yet, proceed to Dipperloaf at White Cliff. Now for the egg to hatch, you would need to go out of this region and return when around 5 minutes have passed.

After waiting, head back to Dipperloaf to receive Crimson Sprinkle as the reward.

For this particular ball skin, you will need to purchase it with some fruits. First, go to the Cave Temple Treasury where you will find Liquorice. Now, give him 200 Fruits to get the Creepy Sprinkle.

This one is located near the waterfall of the Cave Temple. Make your way to the nearby Caves and find the Bling Sprinkle in a Treasure Chest.

If you can't get to the paint, check out the video:
Timecodes:
Crimson Bauble: 24:16 and 31:28
Deadly Bauble: 1:06:44
Bling Bauble: 1:24:46
Creepy Bauble: 1:31:30
Sweet Bauble: 1:45:00

Watch this for know how combinate the colors:
https://sp.zhabite.com/sharedfiles/filedetails/?id=1952731075

Special thanks to WarsheepGER for the screenshot. And xWinG 驫麤 for the video walkthrough.