The Spike Production Building is an Upgrade Building in Bloons Monkey City . It is one of the many buildings available for purchase to the player when they build their city and is used to purchase upgrades for Tack Shooters and Spike Factories (Spike Factories only in BMC Mobile).
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On Flash, as more upgrades are bought, the Spike Production Building gets more gears, different paint, a better door that opens, and a smokestack that launches spikes
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