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Spike Ball MiniGun is a power-up that comes out from the Golden Bloon or the Power-Up Bloon. It fires 3 chains of Spiked Balls every frame. Spiked Balls will be Flechette Darts, making this similar to an upgraded version of Spikey Shots. It is weak against Lead Bloons without research, but it is strong against MOAB-Class Bloons and Ceramic Bloons. This cannot be obtained by upgrading.