In a blue post:
Pets will still be merged on MoP launch, but instead of placing them in your bags or mail they will be placed directly in your pet journal. You will be allowed to have more than 500 and 3x per pet during this process. Any pets that are flagged as unique will be merged into one and also placed in your journal. (Unique pets are from Achievements, Pet Store, Promotions and Guild) You will be able to cage any pets that are tradeable and you can release anything that you have more than one of.
A few examples:
- A B.net account has a total of 6 Wolvar Pups across all of it’s characters. On merge the B.net account would have 6 Wolvar Pups. This would be the only time an account is allowed to have more than 3x of a single pet.
- A B.net account has a total of 3 Murky’s from BlizzCon 2005 and 4 Nuts from the pet collection achievements across all of it’s characters. (both unique pets) On merge the B.net account will have 1 Murky and 1 Nuts.