Originally, medal is a currency item that can be obtained by completing levels in the Endless Zone events, and at times dropped by zombies. As the player progresses through the levels, their rewards of this currency increases. Medals are used to unlock plants that require Puzzle Pieces to be unlocked. They can also be used to purchase Puzzle Pieces themselves. However, since April 3, 2015 until PvP Mode's release, medals could not be obtained, as their supporting event is no longer available.
Gosh, I can grow leaves!
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