Rainbow Tink is a Premium Box Tsum. She is currently only available on the Japanese version. She is a Limited Event Tsum and is not available from purchasing Premium Boxes outside of the event. She was first introduced during the Japan event Seasons of Pixie Hollow (June 2019).
Rainbow Tink will clear the left and right sides of the screen, followed by clearing the middle area of Tsums. Her base radius is SS.