Battle-Stone
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Pet Battle System |
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Battle-Stones are items used to upgrade a battle pet to uncommon or rare quality.
[Polished Battle-Stone] can be used to upgrade a pet to uncommon quality, while all kinds of Flawless Battle-Stone will upgrade a pet to rare quality. Polished Battle-Stone and the generic 
[Flawless Battle-Stone] can be used on any pet, while all other kinds can only be used on a pet of the appropriate type.
Source
Flawless Battle-Stones of all kinds have a small chance to be obtained upon winning a battle against wild pets. Type-specific Battle-Stones also have a small chance to be obtained from the 
[Sack of Pet Supplies] awarded from defeating master trainers.
Players can also trade in any 3 of the same family specific Flawless Battle-Stones for a single [Marked Flawless Battle-Stone].
Battle-Stones
- [Polished Battle-Stone]
- [Flawless Battle-Stone]
[Flawless Aquatic Battle-Stone]
[Flawless Beast Battle-Stone]
[Flawless Critter Battle-Stone]
[Flawless Dragonkin Battle-Stone]
[Flawless Elemental Battle-Stone]
[Flawless Flying Battle-Stone]
[Flawless Humanoid Battle-Stone]
[Flawless Magic Battle-Stone]
[Flawless Mechanical Battle-Stone]
[Flawless Undead Battle-Stone]- [Marked Flawless Battle-Stone]
Patch changes
Patch 5.4.0 (2013-09-10): Players are now able to trade in any 3 of the same family specific Flawless Battle-Stones for a single [Marked Flawless Battle-Stone]. - Patch 5.2.0 (2013-03-05): Now have a chance to be awarded from PvP Pet Battles.
- Patch 5.1.0 (2012-11-27): Added.