Negatite Nail Polish is a nail polish that has Negatite in it and is made by Lady Rancora with the help of the Negatite Nail Care holo-book.
Description[]
After Cassie got rid of her last bouquet of negative flowers, all Star Darlings were invited to a nail polish party, after which they started acting different than usual without realizing it. Sage had fits of laughter, Libby was very sleepy, Leona was doing something other than what she was saying, Vega was rhyming, Scarlet was skipping, Cassie was bragging, Piper was finishing sentences for others, Astra was mischievous, everything tasted like moonberries for Tessa, Adora spoke very softly, Clover hugged everyone, and Gemma took everything literally.
It only ended when Piper and Astra brought home some nail polish remover from Wishworld and they cleaned all the nail polish off.