Plasma Vision

Plasma Vision is the 3rd upgrade for the Super Monkey in BTD4, and is the second upgrade on Path 1 in BTD5. It has appeared in BTD3, BTD4 and BTD5. It costs $4250 on Easy, $5000 on Medium, $5400 on Hard and $6000 on Impoppable. In BTD5, it is called Plasma Blasts. This upgrade lets the Super Monkey shoot Plasma Beams, doubles the firing rate, increases popping power by 1 and can pop Lead Bloons.

BTD3
$3400 (Easy), $4080 (Medium), $4320 (Hard)

BTD4
$3400 (Easy), $4000 (Medium), $4320 (Hard)

BTD5
$4250 (Easy), $5000 (Medium), $5400 (Hard), $6000 (Impoppable)

Trivia

 * A Super Monkey with Plasma Vision is better at taking down non M.O.A.B. Class Bloons than a Robo Monkey with no Path 1 upgrades.
 * A Robo Monkey with Plasma Vision can fire 2 Plasma streams, with a higher popping power.
 * In BTD3, this upgrade doesn't change how the Super Monkey looks. In BTD4 and later versions however, it'll give the Super Monkey a purple cape and goggles, possibly to prevent copyright problems.
 * In Co-op Mode, Plasma Vision used to be nerfed and it shoots slower, but pops twice as much bloons; this was mostly based on computer performance.
 * On BTD Battles, it shoots balls of plasma very fast. While on BTD5 (and Deluxe), it is a solid beam of plasma.
 * It can do heavy damage to a MOAB, one can destroy it and its children by itself.
 * Apperently plasma blasts shoots slightly slower than double the speed of lasers. This is noticable in Bloons TD 5 Mobile because plasma blasts damage MOAB-class bloons slightly slower than lasers, even though it should theoretically be the same.
 * In Bloons Monkey City, the artwork shows the "B" from the chest in a mirror-like view.
 * In BTD3 and BTD4, Plasma Vision cost the same as the Super Monkey without upgrades.
 * Getting this upgrade with the Robo Monkey is deadly MOAB popping power.