Perfect World has released details of the mounts and pets system in the upcoming MMO Battle of the Immortals.
It seems that mounts are upgradable, and are able to be used in combat! They seem to change appearance as they level up too. Also nearly every creature can become a pet, which is cool in anyone’s book. The pet also can level up and have their own skill set much like your own! I’m guessing everyone who can have a pet will be searching far and wide for their soon-to-be best friend.