When the sprites venture far back in the Color Cave, they discover the Princess and Count Blogg (from
Rainbow Brite and the Star Stealer (1985)). The Princess tells them she's the queen of the sprites and her "diamond finder" indicated there were diamonds in the Color Cave. She demands the sprites dig for them so she can get enough to re-energize her "magic stone." With that done, she can get her power back and "do something about that nasty little girl who destroyed" it. With the colors fading all over Rainbowland, Rainbow Brite must defeat the Princess once again!
—grrlpunk