The TCG expansion deck, Throne of the Tides, was officially released this week, and with it came the Purple Puffer mini-pet. Unfortunately, players will not be able to redeem their loot codes for this companion until patch 4.3 goes live. This was confirmed by a blue poster earlier this evening. [source]
The items awarded from the latest TCG loot cards will be added to the game with the release of patch 4.3, so they can't be redeemed before the items exist.
We will add the Purple Puffer's pet profile to WarcraftPets after it is released in patch 4.3, so hang in there and stay tuned!
Purple Puffer Redeemable In 4.3
October 13, 2011