1990: Rainbow Curl Ponies
RAINBOW RIDER
Lavender unicorn with pale pink, yellow, lavender, dark pink ringlets. Rainbow music stave symbol with blue notes and pink stars.
Rainbow Rider was the explorer and adventurer of her set, riding rainbows around Ponyland and - occasionally - turning water into rainbow droplets, for whatever occasion called for it. For some reason she was always drawn in the comics a lot more darkly purple than the pony actually turned out to be.
In the North American release she was called Streaky :S
The pale pink ringlet in her hair can fade to white in sunlight (this isn't a variation) and she can lose her curls quite easily, especially if groomed when wet.