In the Bloons Tower Defense Games and Bloons Super Monkey aswell as Bloons Pop!, Bloons come in different layers, taking multiple hits to pop them. Bloon is a play/pun on the word Balloon, and as such Bloons resemble balloons in the games Bloons appear in. Beginning in Bloons Tower Defense 5, and extending to Bloons Monkey City and BTD Battles, bloons are able to spawn with two different types of abnormal statuses, Camo and Regrowth. BTD6 added Fortified to the list of possible statuses. These make bloons harder to pop and bloons can have any combination of statuses they can have individually, or none at all.
Camo: Can only be hit by Towers that are stated as having Camo detection, either by default or through upgrades. DDTs have a similar property by default, and BTD4 had a specific Camo bloon with this property.
Regrowth: After losing layers, will regenerate layers to full health over time. Cannot apply to blimp layers.
Fortified: Allows the Bloon to take extra damage before its outermost layer gets popped. Only applies to specific bloon types such as Lead, Ceramic, and MOAB-Class Bloons.
As of October 2021, there are 130+ different types of Bloons.
Bloons Tower Defense series
The Bloons Tower Defense series introduces bloons in a different way to pop them. Unlike the Bloons in previous Bloons games, different colors of bloons contain different layers of bloons, represented by a term called Red Bloon Equivalent (shortly RBE). For example, a Red Bloon has an RBE of 1, but a Blue Bloon contains a red Bloon, meaning its RBE is 2. A Green Bloon contains a Blue Bloon which contains a Red Bloon, so its RBE is 3 and so on.
Below are the different layers of Bloons in the Bloons Tower Defense:
In Bloons Tower Defense 4, the Camo Bloon was a unique bloon type of RBE 11 (the in-game RBE says 9), containing 2 Pink Bloons, and can be "accidentally" popped by towers without camo detection. In Bloons Tower Defense 5, however, any bloon lesser than a M.O.A.B. may have a camo attribute. Bloons Monkey City has the D.D.T., which is a fast-moving camo explosion-immune MOAB-class bloon. Any bloon with this attribute may only be targeted by certain towers unless under the influence of a 0/2 Monkey Buccaneer with the Tier 3 Pirate Cove building, Radar ScannerMonkey Village or the BTD5 Special Agent Meerkat. First camo bloon comes at round 24 (it is a green in BTD5).
There are three types of tower that can pop Camos without upgrades: the Ninja Monkey, the Dartling Gun and the Spike Factory. Other towers may require upgrades to detect Camo Bloons, or require assistance of a Radar Scanner close by. You can remove the camo status with a X/3 Mortar Tower, a tier 4 Ice Fortress, foam from an 3/X Engineer, a 3/X Sub when submerged, or a projectile from a Ninja upgraded to Counter-Espionage.
In Bloons TD 5, any bloon under the rank of a M.O.A.B. may have this attribute which causes them to gain back lost layers over time (hence its name).
No layers over its original may be gained. Bloons on a higher tier than Pink may multiply, unless on a late round where Freeplay rules exist. For instance, a Black Bloon gets popped into 2 pinks, which turn into 2 blacks, and if both get popped they become 4 pinks, and so on. This caused a problem where players could get infinite amounts of money by using Tempest Tornado wizards to endlessly pop and blow back bloons which they regrowed into more bloons and had a strong defense in the back (like a Sun God) to avoid losing the game. This was called Regen Farming and was fixed in an update for BTD5 Flash and also for BMC Flash. It is still possible to do on Deluxe and iOS Versions of Bloons TD 5, but never was possible in Bloons TD 6 and was mostly patched for Bloons Adventure Time TD in later updates.
A form of regen farming that does not exploit glitches or bugs is the use of Tempest Tornado and the Supply Drop ability. As long as the bloons are not completely destroyed and the round is dragged out so that the ability will continue to recharge, this will help players gain large amounts of in-game cash fairly easily. Note that Regrow Farming is far less effective in BTD6 due to the fact that income-producing abilities have a cap in usages per round and in addition to having full initial cooldowns for such abilities too.
In Bloons Tower Defense 6, a bloon that is a Lead, Ceramic, or a M.O.A.B. Class Bloon, may have have a fortified attribute which allows bloons to have "armor" that allows them to take more hits to pop. The Fortified layer of an ordinary bloon does not pass on to its children when popped. For example, a Fortified Ceramic Bloon pops into two normal Rainbow Bloons, as Rainbow Bloons cannot have the Fortified ability, and they do not regenerate the fortified property when they become ceramics again. M.O.A.B. Class Bloons can also be Fortified, making them much stronger and generally more dangerous. Fortified MOAB-Class Bloons can pass on their Fortified ability to its children, until its Fortified Ceramic Bloons from them are popped.
In version 1.0 of Bloons Tower Defense 6, purple bloons could be fortified, though they only came out in freeplay after round 100. Fortified purples were removed in version 2.0
First appearing in Bloons Adventure Time TD, a zombie bloon is another type of bloon. When a zombie bloon is popped, it will leave behind a gravestone, which during the next turn the gravestone will release a non-zombie version of the base bloon. The new bloon can have camo, regrow, and fortified properties as well. The zombie bloon kind of returns in Bloons Tower Defense 6 as an unpopped bloon for the Necromancers: Unpopped army and the Prince of Darkness upgrade for the wizard monkey (X-X-4+). Unlike the zombie bloons, the upopped bloon will work for the monkeys instead of against the monkeys.
First appearing in Bloons Adventure Time TD, shielded bloons are regular bloon variants that take a few hits to destroy their shielded layer, revealing the regular bloon once the shield layer has been destroyed. Notably, they function the same as their BSM2 counterparts.
First (and exclusively) appearing in Bloons Adventure Time TD, ghost bloons are an attribute that prevents physical damage like swords and bombs from damaging the bloon. This attribute can also be applied to MOABs, BFBs, and ZOMGs. It can be considered the opposite of the Purple Bloon.
In the Bloons games, there are 23 Bloon types, many of which also have special effects, such as exploding or dropping a spiked ball when popped. Usually, they are popped in one hit regardless of type or color. Other effects include providing an extra dart or a boomerang to throw. In later Bloons games, there are also bloons that require multiple hits to pop, like the Helium Bloon which floats up after being touched once, then it can be touched again before popping.
This game introduces various new bloons never appeared before, and keep the bloons that appeared in the Bloons Tower Defense games except the D.D.T, the B.A.D. and the camo and regenerating properties.
Shielded Bloons made their debut in Bloons Super Monkey 2's 1-4 stage. In the middle of the bloon is a lightning symbol. These bloons take several hits to pop their outer layer, before revealing non-shielded children. Super Monkey cannot move through these Bloons.
In Bloons Pop!, the bloons from Bloons TD 6 up to MOAB are available in the game, along with all three bloon properties in that game plus Shielded Bloons from other games and a few exclusive bloons.
In most games, blimps have the base set of health until ramping occurs.
Starting in Bloons TD 5, bloons and blimps gain health and speed in freeplay mode.
In Bloons TD 5, the speed multiplier can be calculated by this formula: max(6.6 * (waveNumber - 85) / (200 - 85),1). In BTD5 Flash and BTD5 Mobile, speed starts increasing on round 103. See also Freeplay Mode for more details for other games in the series, specifically BTDB and BMC and their mobile counterparts.
For bloon health, see the table below:
1.5x health +2% per round
2.1x health +5% per round
In Bloons Monkey City after round 30, the bloons get a 25% (15% in mobile) increase in health and 5% increase in speed for each round until round 103, at which point it becomes exponential and uses the BTD5 speed formula alongside the 5% per round. As of May 5, 2016, boss bloons also receive the speed increases starting on boss level 31, although this buff has only been confirmed on the Flash version.
In Bloons TD 6, as of the 11.0 update, ramping has changed drastically due to the co-op update. Previously it was +2% speed and health per round from 81-115, then it was +5% per round from that point onwards without the speed increment changing. As of now, the blimps gain further speed and health starting from Round 101.
All MOAB-Class Bloons can be hit by towers on the sections not on the track; this effect is more noticeable when dealing with stronger MOAB-Class Bloons such as the B.F.B. and the Z.O.M.G. The harder the blimp is to pop the bigger the range of the tower can hit it from.
Ceramic Bloons and its descendants no longer split into multiple bloons in Freeplay Mode, but the number of hits to destroy a ceramic is increased to 38 hits (60/120 in BTD6). (Usually referred to as Super Ceramics)
The term "bloon" came from the word "balloon", but has one syllable instead of two.
Out of all 101 types, there are 24 that have the RBE of 1, and 28 that can have the RBE of 1.
In the Mobile version of BMC, DDTs usually come in singlets and they don't have lead or black properties. Probably for making the mobile BMC easier, according to sources, but it still hasn't been confirmed whether it was intentional or not.
The second tier upgrade for the Heli Pilot, Enhanced IFR Instruments, reveals that bloons are of higher temperature than their surrounding, this is shown when a Camo Bloon is frozen under a Ice Tower next to a 0/2 Village.