Legion Beta - Build 21846
- still no 700 unique pets collected AV
- didnt spot any new Order Hall pets (but the Shaman one is not/no longer marked as one - dont know if it was like this all the time)
probably old info:
Pocket Pet Portal (item to increase max. amount of pets to 1500, up from 1000)
Source: complete 30 pet battle world quests (all unique)
There are 10 achievements where you've to defeat all 12 Master Tamers on Broken Isles with a single pet family.
Another meta achievement rewards "Nightmare Treant" for completing the 12 achievements.