Purple Bloon

"Purple Bloons contain 2 Pink Bloons, are fast AND are immune to all energy, fire, and plasma type effects."

- Message upon first encounter (BTD6)

The  is a bloon first introduced in Bloons TD 6, appearing on rounds 25, 32, 45, 48, 62, 78 and 95. It also appears in Bloons Adventure Time TD, Bloons Pop!, and Bloons TD Battles 2. It has immunity to energy, plasma, and fire effects, is almost as fast as a Pink Bloon, is a parent of two pink bloons, and has an RBE of 11. It could be compared to the White Bloon and Black Bloon for its immunity to certain attacks; however, unlike them, the Purple Bloon has no parent bloon. It could also be considered the inverse of the Lead Bloon, which is immune to sharp objects, as well as the successor to Bloons Super Monkey 2's Glass Bloon, which is immune to energy attacks.

Bloons Pop!
"Immune to magic shots"

- Short description

Immunity
Without placing the affected towers within a Monkey Village with the upgrade Monkey Intelligence Bureau, or Tuxedo Jake with his Inspiring Melody upgrade in Bloons Adventure Time TD, the Purple Bloon cannot be popped by most fire or energy-based upgrades. The Purple Bloon is immune to the following towers and upgrades:

Bloons TD 6

 * Wizard Monkey attacks (except for the Necromancer upgrade and Wizard Lord Phoenix ability, though Shimmer can remove Purple Bloon's camo).
 * Super Monkeys upgraded to Laser Blasts or Plasma Blasts, Sun Avatar and Tech Terror, unless they have Sun Temple, The Anti-Bloon, or Dark Champion.
 * The Sun Avatar gains the ability to pop purple bloons if the player has the Monkey Knowledge skill "Strike Down the False".
 * Dart Monkeys under the effects of the Plasma Monkey Fan Club ability.
 * Gwendolin's attacks before level 16.
 * Obyn Greenfoot's main attack.
 * Druid's Heart of Thunder and Ball Lightning attacks, but not the thorn attacks.
 * Monkey Buccaneer's Hot Shot upgrade (grapes only).
 * Tack Shooters upgraded to Ring of Fire or Inferno Ring.
 * The plasma and laser projectiles from Apache Prime.
 * The attack monsters from Transforming Tonic and Total Transformation.
 * Ezili's attacks, including immunity-stripping, but not the Heartstopper ability.
 * Sentry Expert's Energy Sentry laser attacks.
 * Sentry Champion's Champion Sentries' plasma attacks.
 * Adora's main attack (except under The Long Arm Of Light).
 * Dartling Gunner upgraded to Laser Cannon or Plasma Accelerator, although the Cross the Streams Monkey Knowledge can damage Purples including Camo Purples.
 * Psi's attacks before level 13 (except Psychic Blast).

Bloons Adventure Time TD

 * Flame Princess' attacks (except when she turns them into Flamebits).
 * Marceline's napalm from Pyrokinesis.
 * Sam's attacks (except Meteor Storm).
 * Supermonkey's attack when upgraded to Laser Eyes or higher (except Disarming Charisma).
 * Laser Butterfly, Banana Man, Ghost Princess, Peppermint Butler, Flame King, Monkey Apprentice, Scorcher, Wizard Lord, Martin, Technological Terror, Clarence, Train Boss, and Martian Transport's attacks.
 * Gunter's attack when upgraded to Orgalorg.
 * Tiny Manticore's Flamethrower attack.
 * Ancient Psychic Tandem War Elephant's Laser Beam attack.
 * Some of Betty Grof's attacks.
 * Moe's SMOs' attacks.
 * Party God's mini Party Gods' attacks
 * Carl the Gem's laser attack.

Round Appearances
The following are all appearances on each round where Purple Bloons will spawn naturally from the entrance. These will not include the rounds where the Black's parents or subsequent parents will feature.

Normal Gameplay

 * Round 25: 25 Yellow Regrowth, 10 Purple
 * Round 32: 15 Black, 20 White, 10 Purple
 * Round 45: 180 Pink, 10 Purple Camo, 4 Fortified Lead, 25 Rainbow
 * Round 48: 40 Pink Regrowth, 30 Purple Camo Regrowth, 40 Rainbow, 3 Fortified Ceramic
 * Round 62: 250 Purple, 15 Rainbow Camo Regrowth, 5 M.O.A.B., 2 Fortified M.O.A.B.
 * Round 78: 80 Purple, 150 Rainbow, 75 Ceramic, 72 Ceramic Camo, 1 B.F.B.
 * Round 95: 500 Purple Camo Regrowth, 250 Fortified Lead Camo Regrowth, 50 Fortified M.O.A.B., 30 D.D.T.
 * Round 101: 450 Purple (1 group of 250 and 1 group of 200), 50 Fortified Ceramic, 10 Fortified M.O.A.B.
 * Round 103: 198 Purple (3 groups of 66), 100 M.O.A.B., 50 Fortified M.O.A.B., 10 Fortified Z.O.M.G.
 * Round 104: 200 Purple (2 groups of 100), 200 Fortified Lead (2 groups of 100) , 200 Ceramic (2 groups of 100) , 150 Fortified M.O.A.B., 25 B.F.B., 14 Fortified B.F.B.
 * Round 107: 444 Purple Camo, 100 Fortified Ceramic, 10 Fortified Z.O.M.G.
 * Round 109: 15 Purple, 30 Fortified M.O.A.B. (15 groups of 2, stacked), 15 B.F.B., 15 Fortified B.F.B. (each stacked with a regular B.F.B.) , 15 Z.O.M.G.
 * Round 116: 400 Purple, 18 Fortified B.F.B., 8 Fortified Z.O.M.G.
 * Round 129: 7 Fortified Z.O.M.G., 77 Fortified Lead Camo, 77 Purple Camo, 77 Ceramic Camo, 7 Z.O.M.G., 18 D.D.T.
 * Round 132: 18 Z.O.M.G., 6 Fortified Z.O.M.G., 200 Purple Camo

Alternate Bloons Rounds

 * Round 15: 20 Blue, 15 Green, 12 Yellow, 10 Pink, 3 Purple
 * Round 22: 16 Purple
 * Round 25: 22 Pink Regrowth, 10 Purple Regrowth
 * Round 32: 10 Purple, 5 Rainbow, 3 Ceramic
 * Round 35: 25 White Regrowth, 3 Ceramic, 25 Purple, 30 Black Camo
 * Round 38: 42 Purple, 17 Black, 14 Lead, 7 Rainbow, 1 Ceramic Regrowth
 * Round 45: 120 Pink, 10 Purple Camo, 4 Fortified Lead, 10 Ceramic
 * Round 48: 30 Purple Camo Regrowth, 80 Black Regrowth, 15 Fortified Lead Regrowth, 3 Fortified Ceramic
 * Round 56: 40 Purple Camo Regrowth, 5 M.O.A.B.
 * Round 62: 250 Purple, 15 Fortified Lead Camo Regrowth, 5 Fortified M.O.A.B, 2 B.F.B.
 * Round 69: 40 Black Camo Regrowth, 40 Purple Camo Regrowth, 50 Camo Ceramic
 * Round 78: 80 Purple, 150 Zebra, 60 Fortified Ceramic, 72 Ceramic Camo, 1 Fortified B.F.B.
 * Round 95: 500 Purple Camo Regrowth, 30 Fortified M.O.A.B, 30 D.D.T.
 * Round 101+: randomized

Bloons Pop!

 * Level X
 * Level X

Bloons TD 6
Rounds marked in italics are marked as technically starting to appear on that round but only ever appear from getting released from parent bloons.

Strategies
Although the Purple Bloon can be easily popped during early rounds, it can be quite dangerous during late rounds, especially on Round 95, where massive amounts of MOAB-Class Bloons appear and the player begins to rely on powerful towers that mainly use energy, fire, and plasma attacks, which the Purple Bloon is immune to. As a result, a group of Purple Bloons can pass through a player's defenses unnoticed, and cause the player to lose. Spike Factories could be used to block any Purple Bloons from escaping the player's defenses without trouble as they never utilize such attacks. Monkey Intelligence Bureau is also helpful for allowing towers to pop Purple Bloons.

In Bloons TD Battles 2, grouped purple rushes on Round 11 or camo purples on Round 12 are some of the most commonly used rushes, as purple bloons move really fast and have a handful of immunities. Purples can also be used for layered rushes with Lead bloons, to render many high-pierce non-AoE projectiles useless, e.g. Wall of Fire, Blade Shooter, etc.

Sounds
When a Purple Bloon is hit by a non-damaging attack:
 * [honk]
 * [honk]
 * [honk]
 * [honk]

Trivia

 * The Purple Bloon has the least RBE of any bloon that can spawn in Freeplay Rounds.
 * Purples in Freeplay are stacked on top of each other, making them harder to handle without the right upgrades in play.
 * However, in later rounds in Freeplay mode, Purple Bloons will eventually stop spawning for several rounds. In versions before 11.0, the Purple Bloon clusters stop spawning on round 151, in version 11.0 it stops on round 121.
 * Purples in Freeplay will always spawn in groups of 1110, or 550 for Camo variants.
 * Fortified Purple Bloons can also appear in Freeplay rounds, making them the only Bloon that can be applied the Fortified property outside Sandbox.
 * Fortified Purple Bloons were removed in the 2.0 update due to the Fortified ability to Purple Bloons being "useless and unintentional".
 * However, the Fortified property did give an extra layer protection to the Purples, making an RBE of 12 for a Fortified Purple.
 * The Purple Bloon has a cyan-colored outline, which might be what is used to act as a shield to energy attacks.
 * Purple Bloons were the last color of the rainbow to be introduced into a bloons game.
 * Red, Blue, Green, and Yellow bloons were introduced in Bloons, and Orange in Bloons Pop 3.
 * In Bloons Adventure Time TD, a farming method known as Purple Bloon Farming exists.
 * On rounds 81+ in BTD6, Purple Bloons will only spawn one Pink Bloon when popped instead of two.
 * The Purple Bloon is the only non-MOAB class bloon to be unable to have the Ghost Bloon trait in BATTD, due to the ghost trait being unable to be hit by physical attacks, whilst purple can't be hit by non-physical attacks. This makes the bloon impossible to hit without certain attacks like Princess Bubblegum and Ice King's attacks or most other character's attacks paired with late game trinkets like Dagger of Chilled Glass or Robo-Monkey Visor.