Gotta Catch 'em All!
It's as if Blizzard were sitting around going 'hmm, what could make WoW even more of a time sink? I know. Pokemon!'
But as it doesn't require the expac to unlock, Pet Battles are providing a nice distraction from not being able to buy Pandaria yet. I used up this months stupid frivolous purchase on that Homestuck thing (SCALEMATES!), so throwing money after a Digital Collectors edition just for a mount and pet will have to wait.
Screw leveling and Pandas. Must catch ALL the pets!