Monkey Tank (Wacky's Conception)

This incarnation of the Monkey Tank is a tower that fires shells at bloons that pop two bloons each, then explode within the same radius as the unupgraded Bomb Shooter's bombs. Also, you can move it around at will! Cost: $640 (Shells only have a 10% chance to pop lead bloons; Attack speed = Bomb Shooter)

Path I

 * Longer Barrel: Can shoot much further now. Cost: $260 (Increases range to that of a 2-X Dart Monkey.)
 * High-Explosive Rounds: Special explosives give it a much bigger blast. Cost: $460 (Increases blast radius to that of an X-1 Bomb Shooter. Still not good against leads.)
 * Greater Force: Harder shots pop way more bloons and smash through ceramics. Cost: $1500 (Shells now pierce 25 bloons before exploding and do 5 damage to ceramic bloons. Also has a 50% chance to pop lead without Armour-Piercing Rounds.)
 * Self-Propelled Gun: SPGs are bigger, and bigger is better! Oh, and SPGs can hit bloons from nearly anywhere. Cost: $3560 (Now has infinite range)

Path II

 * Bloon Detector: Can now hit those pesky camo bloons. Cost: $260
 * Armour-Piercing Rounds: Leads are way more likely to get popped! Cost: $385 (Now pops lead 100% of the time.)
 * Rocket Carrier: Upgrade to a fast-moving truck that fires rockets that fly faster and reload easier than tank shells! Cost: $1700 (Reloads at the speed of an X-2 Bomb Shooter; Explosions are as big as those made by a 2-X Mortar Monkey and pop three layers of bloon; Drives at the speed of a green bloon when repositioning.)
 * Katyusha: This legendary piece of artillery has been placed on the battlefield, and you can use it to your advantage! Barrage ability that fires rockets at a rate of one-per-frame for 10 seconds. After that, it doesn't shoot for 15 seconds. Cooldown: 1 minute. Cost: $4250 (Fires at the speed of an X-4 Mortar Monkey.)

Trivia

 * This tower was originally submitted (by me, of course) in a suggestion on the NK Forums (Shown here.
 * This was meant to combine aspects of two very different tanks suggested to NK.
 * The reason why the SPG and Katyusha cost so low is because there izzunt enuff dakka are not enough towers with mid-range final upgrade costs.