I was about to post the same thing. Pony roulette would summon a random mount from the following list:

Unicorn
Nightmare
Aithon
Xanthos
Gullfaxi
Enbarr
Markab
Boreas
Kirin
Sleipnir
Frontlines GC mount

A similar idea would be welcome for Beastmen Tribe mounts

While on the subject of mounts, the riding position on ponies for female characters should be dependent on what leg armor the character has equipped. It's kinda weird seeing my character ride all maiden-like in full PLD plate mail