Leveling pet from 1-15 costs you 1 BOP battle-stone (no elemental or undead)
Leveling pet from 15-20 costs you 1 BOP battle-stone (no elemental or undead)
Leveling pet from 20-25 costs you 1 BOP battle-stone (no elemental or undead)
or
Pet from 1-25 costs you 1 Flawless Battle-Stone
Here is how this works. I'll create a toon on your realm, you will pay your upgrades and pass me the cageable pet you want at the apropriete level. 1-3 days later you get your 15, 20 or 25 pet in the mail.
If interrested drop me a whisper BattleTag: Darky#1885