Improving rarity of pets

[Bindibear]

From the 5.1 pre-PRT notes on MMO-champion:

"Pet Battles Improvements
Several UI and other improvements will be added to the Pet Battles system, including a way to upgrade the rarity of pets that you’ve captured."

[Kalium]

I wonder how this will be done... maybe level a pet to 25 and you can opt to drop it back to level 1 and improve it's quality level? If so that would be really cool. Anyone else have an idea how this might be achieved?

[Snowyjoe]

I like your idea Kalium.

In my opinion this feature should be an alternative to farming are pets but still challenging in the same way, not an easier one.

I was wondering if it'll be a drop item from the Pet Battle dallies. With a low drop chance of course.

[Croxy]

The way it's going to be done has been confirmed to be items that drop rarely from pet battles. There will be two stones. One to upgrade up to uncommon and another to rare. It seems that they will sometimes have restrictions such as for pets in the undead family only.

Personally, I can't wait! n.n

[Emi]

I've been wondering, Because I captured a giraffe calf but he is only grey, and I can't ever find another one and was hoping to upgrade him! <3