1990: Glittering Sweetheart Sister Ponies
STARFLASH
Pale blue sweetheart sister style pony with lavender mane and tail rooted with dark pinkish tinsel. Glittering purple hearts design, pink floral earring.
Starflash was something of an enigma in many ways. Fairly often she was depicted in the UK Pony Comic with a white body and dark pink hair, although she was never in fact sold in these colours.
MISDRAWN STARFLASH: THE REASON FOR THE WHITE PONY RUMOURS
(UK COMIC)
The general belief is that - since the comic artists generally worked from prototype pictures - Starflash's prototype must have been badly photographed to give such mistaken colours.
The stories for these ponies followed the way in which they became glittery and got their names, rather like the Sparkle Ponies. I don't know how the story compares with the US version, but the story from Starflash's box is below:
STARFLASH: BOX STORY (UK, 1990)
She was sold on card in North America and in some other countries, but with the same comb:
STARFLASH: US CARDED EDITION
(Accessory: Glittery melon pink star pick)
Thanks to Dollhands for this image