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| Upgrade Bloons
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| Increases by one rank the next 15 bloons spawned, up to a maximum of Rainbow. Three uses.
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| Category
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Bloon
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Tier
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4
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| Cooldown
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20 seconds
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Uses
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3
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Upgrade Bloons is a tier 4 Bloon Power in the mobile version of Bloons TD Battles. It increases the layers of up to the next 15 non-blimp Bloons by 1, up to Rainbow Bloon. This effect lasts permanently on affected bloons, but the effect lasts certain seconds to prevent stacking the bonus layers.
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