Appearance Cream
From Starfy Wiki
The Appearance Cream (Japanese: すがたクリーム) is an item in Densetsu no Starfy 4. It is found in Flourishing Desert (Stage 6-1). When applied, it causes a transparent figure to become fully visible.
In the story, Dorocy wanted Starfy, Starly and Moe to find it so that she could become a fully visible fairy. In order to obtain the Appearance Cream, Starfy must first fill a pink, orange and blue Water Balloon using the three Full Tanks of Water found throughout the area. When Starfy uses a Star Spin on a filled Water Balloon, it will destroy the stones blocking the way to a door.