M.E.T.A.G.R.O.S.S

It stands for Monstrous Enormous Tangled Atomic Giga Rossum Omega Ship of Satisfying destruction (the capital letters mean the word is part of the acronym) it only appears on maps where the track is completely water

it also travels at a incredibly slow speed of a sabotaged glued permafrosted red bloon (well it is tangled and its a ship that runs on explosions) and the dual machine guns take 10,000 then the anti aircraft missile launchers take 25000 hits and when destroyed they release 2 Moabs for each one then the final thing the hull takes a 1,000,000 hits luckily it appears on round 1,000 and when completely destroyed it gives you the you are the best mission but before you get it, it releases five M.E.T.A.N.Gs

I AM THE POKEMON MASTER
calls in ten fully evolved starter pokemon and one legendary pokemon

POKEMON EGGS EVERYWHERE
Spawns five to nine pokemon eggs which spawn Pretty much dummies

METEOR MASH
mashs bunches of asteroids causing shrapnel to fly everywhere to damage your towers dealing 100 hp each

Psychic crusher
you thought the attack on the M.E.T.A.N.G was op well wait for this this destroys towers with costs below 25000 O_o

Homing anti aircraft missiles
if you have any flying vehicles or towers this will shoot missiles if its a actual monkey it gets half its health deducted if its a flying vehicle it crashes down and you have to repair it with the price it would take to sell it

dual machine guns
shoots a 100000 bullets that only do a hilariously weak 0.3 damage

origin
it was the middle of the atomic war between the bloons and monkeys the bloons thought up a plan to create a battle ship equipped with things that rivaled the  monkeys tanks and was eventually made into 65 versions but one capsized on a iceberg hundreds of meters long and floated to the bottom of the ocean and found by the evil organization the industrial blimps it was made to destroy everything and was deployed on its fourth voyage...