Mk. 0

The Forbidden Project: Bloon Mark Zero (Or just the Mk. 0 for short). It is the boss of the Monkey's Last Stand mission. Unlike the other two non-joke bloons whose names involve Mk., it is not automatically camo. Instead, it is automatically regen, as it regenerates 10 HP a second. It's the strongest Mk. Bloon yet, at a great 40,000 HP. Of course, with such great strength comes great.... slowness. It's as fast as a Blue Bloon. Like the other Mk. Bloons, it doesn't spawn anything.... when popped, that is. It has the following abilities:

Missile Blast: Fires 0-2 Missiles at your towers, dealing 20 damage in a small area.

Double Ion Laser Beams: Fires infinite-pierce ion laser beams that face foward, dealing 0.5 damage a second to any tower it happens to hit.

Soul Power: Activates its Soul Crystal.

History

 * The Mk. 0, under the codename "G.A.D.G.E.T." (Ginourmously Advanced Destroyer of Great Environments and Tools", was first developed long after the end of time by Omega Bloon, in an act of revenge against Alpha Bloon.
 * Unlike the Mk. IV, an entire dimension worth of lives were killed to permit its creation, although only a few million souls were used to power it, all those deaths opened the door to its creation!
 * To gain the innumerable supplies for this überblimp, Omega Bloon created an alternate dimension branching off from the time between the Fourth Bloon War and the Fifth Bloon War, just to destroy the entire planet and take all the needed supplies. Even the Master of The Multiverse Itself couldn't stop its creation, no matter how hard he tried. Its creation alone proved that Omega was worse than Apopalypse, going so far as to kill over 7 billion lives, destroy an entire planet, and ignore the attempts at halting the project done by Mu-Nu, the ultimate sapient bloon.
 * Not even Omega himself knows exactly how this bloon works, besides the control module hidden deep within the forsaken technology. All that anybody knows is that the technology is dramatically more complex than the Mk. IV; nobody will ever be able to understand the required technology, not even the smartest bloon in the most optimal universe!
 * Only Omega himself was involved in its creation. Just one lone bloon with infinite time and infinite resources, perfecting the most destructive thing that could be built by even a remotely sane mind.
 * Oh, and you have to fight this thing. Joy.

Trivia

 * It is the secret 0th installment in the series of the bloons whose names or titles involve "Mk.".
 * If you are wondering, the ZOMG is the Mk. I, the S.U.P.E.R.B. is the Mk. II, the Mk. III is the B.L.I.T.Z., there is the Mk. IV and the fearsome Mk. V.
 * The BGM for its boss battle is that of the final battle against Ghetsis in Pokemon Black 2/White 2.