Pet Battles Music
Pet Battles is turning out to be quite a sophisticated feature. Not only will it have its own unique UI and combat system, Blizzard is even adding pet battles music! [source]
Mathew McCurley from WoW Insider commented on the newly datamined musical pieces and how they seem to touch on the faction songs in the original Warcraft games.
Take a listen and you be the judge!
New Leveling Achievement
MMO-Champion also datamined a new pet leveling achievement, Newbie, which requires players to raise a pet to level 3. [source]
This achievement is not yet tied into the main achievement tier, but it would not be a surprise if it became part of the pet leveling progression.
MoP Beta: Pet Battles Music and New Achievement
June 05, 2012