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The term "Heavy Metal Bloon" is only a popular term coined by fans and has not been confirmed by official sources. |

Heavy Metal Bloon health stages
The Heavy Metal Bloon (also known as Robotic Lead Monstrosity or Underground Boss) is the final boss of Bloons Super Monkey 2 that appears in Mount Magma. It is a giant rocket-propelled metal blimp shaped like a Lead Bloon. Not only is this boss extremely difficult to pop/destroy, but it also defends itself by creating weapons and barriers out of Shielded and Phasing Bloons.
Trivia
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- Despite looking like a Lead Bloon, the Heavy Metal Bloon can be damaged by darts, boomerangs and their upgrades.
- It has what looks like an extremely electrically charged Shielded Bloon, that seems to be powering/controlling the boss.
- It has roughly 16,000 healthpoints.
- It is possible to destroy this boss with Tier 5 upgrades
Strategies
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- Main article: Heavy Metal Bloon/Strategies
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