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"The Bloon", a.k.a. "The Bloon That Has No Name", is a boss that appears in the center of the game area without warning between rounds 115 and 116 of the next Bloons Tower Defense game. It has no entry in the Bloonopedia, and it can't be stopped by towers (since it comes between rounds). However, you can't move on to round 116 without defeating it. You defeat it by clicking ten specific spots on The Bloon as they become highlighted, but this must be done quickly, or The Bloon will explode, causing 40 damage to all of your towers and causing you to lose 100 lives.