Pirate101 is celebrating the Chinese New Year with amazing Horse Related Crown Shop Companions and Mounts!
But hey, that Aquilan Pegasus Mount is only unlocked if you finish a certain quest in Aquila. Once you complete the labyrinth, the side quest "The Wings of Change" given by Polyeagos in Delphos will become available.
You should start this quest which will help you unlock the Pegasus mount in the Crown Shop.
The mount is normally 10k crowns, but with this sale going on, it will be HALF off! But this sale is only available until February 2nd. So grab it while it's available. Good luck!