Hardly a very progressive stance from Prince Acorne agreeing to this stupid match and not, e.g. asking Majesty to twirl her magic horn and all too predictable body horror transformation redacted — ed. the troll. He cheats at conkers too, and yet this guy's supposed to be the hero and the dashing prince? Poor, poor Princess Sweetbriar.
Anyway, Rainbow Rider (US: "Streaky") and Rainbow Magic (US: "Ringlet") are two Rainbow Curl ponies from year 8.